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Category — zero-day
Hackers Deploy Linux Rootkits via Cisco SNMP Flaw in 'Zero Disco' Attacks

Hackers Deploy Linux Rootkits via Cisco SNMP Flaw in 'Zero Disco' Attacks

Oct 16, 2025 Vulnerability / Linux
Cybersecurity researchers have disclosed details of a new campaign that exploited a recently disclosed security flaw impacting Cisco IOS Software and IOS XE Software to deploy Linux rootkits on older, unprotected systems. The activity, codenamed Operation Zero Disco by Trend Micro, involves the weaponization of CVE-2025-20352 (CVSS score: 7.7), a stack overflow vulnerability in the Simple Network Management Protocol (SNMP) subsystem that could allow an authenticated, remote attacker to execute arbitrary code by sending crafted SNMP packets to a susceptible device. The intrusions have not been attributed to any known threat actor or group. The shortcoming was patched by Cisco late last month, but not before it was exploited as a zero-day in real-world attacks. "The operation primarily impacted Cisco 9400, 9300, and legacy 3750G series devices, with additional attempts to exploit a modified Telnet vulnerability (based on CVE-2017-3881 ) to enable memory access," research...
Two New Windows Zero-Days Exploited in the Wild — One Affects Every Version Ever Shipped

Two New Windows Zero-Days Exploited in the Wild — One Affects Every Version Ever Shipped

Oct 15, 2025 Vulnerability / Patch Tuesday
Microsoft on Tuesday released fixes for a whopping 183 security flaws spanning its products, including three vulnerabilities that have come under active exploitation in the wild, as the tech giant officially ended support for its Windows 10 operating system unless the PCs are enrolled in the Extended Security Updates ( ESU ) program. Of the 183 vulnerabilities, eight of them are non-Microsoft issued CVEs. As many as 165 flaws have been rated as Important in severity, followed by 17 as Critical and one as Moderate. The vast majority of them relate to elevation of privilege vulnerabilities (84), with remote code execution (33), information disclosure (28), spoofing (14), denial-of-service (11), and security feature bypass (11) issues accounting for the rest. The updates are in addition to the 25 vulnerabilities Microsoft addressed in its Chromium-based Edge browser since the release of September 2025's Patch Tuesday update . The two Windows zero-days that have come under activ...
⚡ Weekly Recap: WhatsApp Worm, Critical CVEs, Oracle 0-Day, Ransomware Cartel & More

⚡ Weekly Recap: WhatsApp Worm, Critical CVEs, Oracle 0-Day, Ransomware Cartel & More

Oct 13, 2025 Cybersecurity / Hacking News
Every week, the cyber world reminds us that silence doesn't mean safety. Attacks often begin quietly — one unpatched flaw, one overlooked credential, one backup left unencrypted. By the time alarms sound, the damage is done. This week's edition looks at how attackers are changing the game — linking different flaws, working together across borders, and even turning trusted tools into weapons. From major software bugs to AI abuse and new phishing tricks, each story shows how fast the threat landscape is shifting and why security needs to move just as quickly. ⚡ Threat of the Week Dozens of Orgs Impacted by Exploitation of Oracle EBS Flaw — Dozens of organizations may have been impacted following the zero-day exploitation of a security flaw in Oracle's E-Business Suite (EBS) software since August 9, 2025, according to Google Threat Intelligence Group (GTIG) and Mandiant. The activity, which bears some hallmarks associated with the Cl0p ransomware crew, is assessed to have fashio...
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CISO Board Reports: Crush It

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2025 Pentest Report: How Attackers Break In

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Discover real exploitable vulnerabilities and defense gaps in our free Cybersecurity Awareness Month report.
Microsoft Locks Down IE Mode After Hackers Turned Legacy Feature Into Backdoor

Microsoft Locks Down IE Mode After Hackers Turned Legacy Feature Into Backdoor

Oct 13, 2025 Browser Security / Windows Security
Microsoft said it has revamped the Internet Explorer (IE) mode in its Edge browser after receiving "credible reports" in August 2025 that unknown threat actors were abusing the backward compatibility feature to gain unauthorized access to users' devices. "Threat actors were leveraging basic social engineering techniques alongside unpatched (0-day) exploits in Internet Explorer's JavaScript engine (Chakra) to gain access to victim devices," the Microsoft Browser Vulnerability Research team said in a report published last week. In the attack chain documented by the Windows maker, the threat actors have been found to trick unsuspecting users into visiting an seemingly legitimate website and then employ a flyout on the page to instruct them into reloading the page in IE mode. Once the page is reloaded, the attackers are said to have weaponized an unspecified exploit in the Chakra engine to obtain remote code execution. The infection sequence culminates w...
From LFI to RCE: Active Exploitation Detected in Gladinet and TrioFox Vulnerability

From LFI to RCE: Active Exploitation Detected in Gladinet and TrioFox Vulnerability

Oct 10, 2025 Vulnerability / Zero-Day
Cybersecurity company Huntress said it has observed active in-the-wild exploitation of an unpatched security flaw impacting Gladinet CentreStack and TrioFox products. The zero-day vulnerability, tracked as CVE-2025-11371 (CVSS score: 6.1), is an unauthenticated local file inclusion bug that allows unintended disclosure of system files. It impacts all versions of the software prior to and including 16.7.10368.56560. Huntress said it first detected the activity on September 27, 2025, uncovering that three of its customers have been impacted so far. It's worth noting that both applications were previously affected by CVE-2025-30406 (CVSS score: 9.0), a case of hard-coded machine key that could allow a threat actor to perform remote code execution via a ViewState deserialization vulnerability. The vulnerability has since come under active exploitation. CVE-2025-11371, per Huntress, "allowed a threat actor to retrieve the machine key from the application Web.config fil...
CL0P-Linked Hackers Breach Dozens of Organizations Through Oracle Software Flaw

CL0P-Linked Hackers Breach Dozens of Organizations Through Oracle Software Flaw

Oct 10, 2025 Vulnerability / Threat Intelligence
Dozens of organizations may have been impacted following the zero-day exploitation of a security flaw in Oracle's E-Business Suite (EBS) software since August 9, 2025 , Google Threat Intelligence Group (GTIG) and Mandiant said in a new report released Thursday. "We're still assessing the scope of this incident , but we believe it affected dozens of organizations," John Hultquist, chief analyst of GTIG at Google Cloud, said in a statement shared with The Hacker News. "Some historic Cl0p data extortion campaigns have had hundreds of victims. Unfortunately, large-scale zero-day campaigns like this are becoming a regular feature of cybercrime." The activity, which bears some hallmarks associated with the Cl0p ransomware crew, is assessed to have fashioned together multiple distinct vulnerabilities, including a zero-day flaw tracked as CVE-2025-61882 (CVSS score: 9.8), to breach target networks and exfiltrate sensitive data. Google said it found evidence of ...
⚡ Weekly Recap: Oracle 0-Day, BitLocker Bypass, VMScape, WhatsApp Worm & More

⚡ Weekly Recap: Oracle 0-Day, BitLocker Bypass, VMScape, WhatsApp Worm & More

Oct 06, 2025 Cybersecurity / Hacking News
The cyber world never hits pause, and staying alert matters more than ever. Every week brings new tricks, smarter attacks, and fresh lessons from the field. This recap cuts through the noise to share what really matters—key trends, warning signs, and stories shaping today's security landscape. Whether you're defending systems or just keeping up, these highlights help you spot what's coming before it lands on your screen. ⚡ Threat of the Week Oracle 0-Day Under Attack — Threat actors with ties to the Cl0p ransomware group have exploited a zero-day flaw in E-Business Suite to facilitate data theft attacks. The vulnerability, tracked as CVE-2025-61882 (CVSS score: 9.8), concerns an unspecified bug that could allow an unauthenticated attacker with network access via HTTP to compromise and take control of the Oracle Concurrent Processing component. In a post shared on LinkedIn, Charles Carmakal, CTO of Mandiant at Google Cloud, said "Cl0p exploited multiple vulnerabilities in Ora...
Zimbra Zero-Day Exploited to Target Brazilian Military via Malicious ICS Files

Zimbra Zero-Day Exploited to Target Brazilian Military via Malicious ICS Files

Oct 06, 2025 Email Security / Zero-Day
A now patched security vulnerability in Zimbra Collaboration was exploited as a zero-day earlier this year in cyber attacks targeting the Brazilian military. Tracked as CVE-2025-27915 (CVSS score: 5.4), the vulnerability is a stored cross-site scripting (XSS) vulnerability in the Classic Web Client that arises as a result of insufficient sanitization of HTML content in ICS calendar files, resulting in arbitrary code execution. "When a user views an e-mail message containing a malicious ICS entry, its embedded JavaScript executes via an ontoggle event inside a <details> tag," according to a description of the flaw in the NIST National Vulnerability Database (NVD). "This allows an attacker to run arbitrary JavaScript within the victim's session, potentially leading to unauthorized actions such as setting e-mail filters to redirect messages to an attacker-controlled address. As a result, an attacker can perform unauthorized actions on the victim's acco...
Urgent: China-Linked Hackers Exploit New VMware Zero-Day Since October 2024

Urgent: China-Linked Hackers Exploit New VMware Zero-Day Since October 2024

Sep 30, 2025 Zero-Day / Vulnerability
A newly patched security flaw impacting Broadcom VMware Tools and VMware Aria Operations has been exploited in the wild as a zero-day since mid-October 2024 by a threat actor called UNC5174, according to NVISO Labs . The vulnerability in question is CVE-2025-41244 (CVSS score: 7.8), a local privilege escalation bug affecting the following versions - VMware Cloud Foundation 4.x and 5.x VMware Cloud Foundation 9.x.x.x VMware Cloud Foundation 13.x.x.x (Windows, Linux) VMware vSphere Foundation 9.x.x.x VMware vSphere Foundation 13.x.x.x (Windows, Linux) VMware Aria Operations 8.x VMware Tools 11.x.x, 12.x.x, and 13.x.x (Windows, Linux) VMware Telco Cloud Platform 4.x and 5.x VMware Telco Cloud Infrastructure 2.x and 3.x "A malicious local actor with non-administrative privileges having access to a VM with VMware Tools installed and managed by Aria Operations with SDMP enabled may exploit this vulnerability to escalate privileges to root on the same VM," VMware sai...
⚡ Weekly Recap: Cisco 0-Day, Record DDoS, LockBit 5.0, BMC Bugs, ShadowV2 Botnet & More

⚡ Weekly Recap: Cisco 0-Day, Record DDoS, LockBit 5.0, BMC Bugs, ShadowV2 Botnet & More

Sep 29, 2025 Cybersecurity / Hacking News
Cybersecurity never stops—and neither do hackers. While you wrapped up last week, new attacks were already underway. From hidden software bugs to massive DDoS attacks and new ransomware tricks, this week's roundup gives you the biggest security moves to know. Whether you're protecting key systems or locking down cloud apps, these are the updates you need before making your next security decision. Take a quick look to start your week informed and one step ahead. ⚡ Threat of the Week Cisco 0-Day Flaws Under Attack — Cybersecurity agencies warned that threat actors have exploited two security flaws affecting Cisco firewalls as part of zero-day attacks to deliver previously undocumented malware families like RayInitiator and LINE VIPER. The RayInitiator and LINE VIPER malware represent a significant evolution on that used in the previous campaign, both in sophistication and its ability to evade detection. The activity involves the exploitation of CVE-2025-20362 (CVSS score: 6.5) a...
Cisco ASA Firewall Zero-Day Exploits Deploy RayInitiator and LINE VIPER Malware

Cisco ASA Firewall Zero-Day Exploits Deploy RayInitiator and LINE VIPER Malware

Sep 26, 2025 Vulnerability / Network Security
The U.K. National Cyber Security Centre (NCSC) has revealed that threat actors have exploited the recently disclosed security flaws impacting Cisco firewalls as part of zero-day attacks to deliver previously undocumented malware families like RayInitiator and LINE VIPER . "The RayInitiator and LINE VIPER malware represent a significant evolution on that used in the previous campaign, both in sophistication and its ability to evade detection," the agency said . Cisco on Thursday revealed that it began investigating attacks on multiple government agencies linked to the state-sponsored campaign in May 2025 that targeted Adaptive Security Appliance (ASA) 5500-X Series devices to implant malware, execute commands, and potentially exfiltrate data from the compromised devices. An in-depth analysis of firmware extracted from the infected devices running Cisco Secure Firewall ASA Software with VPN web services enabled ultimately led to the discovery of a memory corruption bug in...
Urgent: Cisco ASA Zero-Day Duo Under Attack; CISA Triggers Emergency Mitigation Directive

Urgent: Cisco ASA Zero-Day Duo Under Attack; CISA Triggers Emergency Mitigation Directive

Sep 25, 2025 Zero-Day / Vulnerability
Cisco is urging customers to patch two security flaws impacting the VPN web server of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software, which it said have been exploited in the wild. The zero-day vulnerabilities in question are listed below - CVE-2025-20333 (CVSS score: 9.9) - An improper validation of user-supplied input in HTTP(S) requests vulnerability that could allow an authenticated, remote attacker with valid VPN user credentials to execute arbitrary code as root on an affected device by sending crafted HTTP requests CVE-2025-20362 (CVSS score: 6.5) - An improper validation of user-supplied input in HTTP(S) requests vulnerability that could allow an unauthenticated, remote attacker to access restricted URL endpoints without authentication by sending crafted HTTP requests Cisco said it's aware of "attempted exploitation" of both vulnerabilities, but did not reveal who may be behind it, ...
UNC5221 Uses BRICKSTORM Backdoor to Infiltrate U.S. Legal and Technology Sectors

UNC5221 Uses BRICKSTORM Backdoor to Infiltrate U.S. Legal and Technology Sectors

Sep 24, 2025 Cyber Espionage / Threat Intelligence
Companies in the legal services, software-as-a-service (SaaS) providers, Business Process Outsourcers (BPOs), and technology sectors in the U.S. have been targeted by a suspected China-nexus cyber espionage group to deliver a known backdoor referred to as BRICKSTORM . The activity, attributed to UNC5221 and closely related, suspected China-nexus threat clusters, is designed to facilitate persistent access to victim organizations for over a year, Mandiant and Google Threat Intelligence Group (GTIG) said in a new report shared with The Hacker News. It's assessed that the objective of BRICKSTORM targeting SaaS providers is to gain access to downstream customer environments or the data SaaS providers host on their customers' behalf, while the targeting of the U.S. legal and technological spheres is likely an attempt to gather information related to national security and international trade, as well as steal intellectual property to advance the development of zero-day exploits. ...
⚡ Weekly Recap: Chrome 0-Day, AI Hacking Tools, DDR5 Bit-Flips, npm Worm & More

⚡ Weekly Recap: Chrome 0-Day, AI Hacking Tools, DDR5 Bit-Flips, npm Worm & More

Sep 22, 2025
The security landscape now moves at a pace no patch cycle can match. Attackers aren't waiting for quarterly updates or monthly fixes—they adapt within hours, blending fresh techniques with old, forgotten flaws to create new openings. A vulnerability closed yesterday can become the blueprint for tomorrow's breach. This week's recap explores the trends driving that constant churn: how threat actors reuse proven tactics in unexpected ways, how emerging technologies widen the attack surface, and what defenders can learn before the next pivot. Read on to see not just what happened, but what it means—so you can stay ahead instead of scrambling to catch up. ⚡ Threat of the Week Google Patches Actively Exploited Chrome 0-Day — Google released security updates for the Chrome web browser to address four vulnerabilities, including one that it said has been exploited in the wild. The zero-day vulnerability, CVE-2025-10585, has been described as a type confusion issue in the V8 JavaScript ...
Fortra Releases Critical Patch for CVSS 10.0 GoAnywhere MFT Vulnerability

Fortra Releases Critical Patch for CVSS 10.0 GoAnywhere MFT Vulnerability

Sep 19, 2025 Vulnerability / Threat Intelligence
Fortra has disclosed details of a critical security flaw in GoAnywhere Managed File Transfer (MFT) software that could result in the execution of arbitrary commands. The vulnerability, tracked as CVE-2025-10035 , carries a CVSS score of 10.0, indicating maximum severity. "A deserialization vulnerability in the License Servlet of Fortra's GoAnywhere MFT allows an actor with a validly forged license response signature to deserialize an arbitrary actor-controlled object, possibly leading to command injection," Fortra said in an advisory released Thursday. The company also noted that successful exploitation of the vulnerability is dependent on the system being publicly accessible over the internet. Users are advised to update to the patched release – version 7.8.4, or the Sustain Release 7.6.3 – to safeguard against potential threats. If immediate patching is not possible, it's advisable to ensure that access to the GoAnywhere Admin Console is not open to the public...
CISA Warns of Two Malware Strains Exploiting Ivanti EPMM CVE-2025-4427 and CVE-2025-4428

CISA Warns of Two Malware Strains Exploiting Ivanti EPMM CVE-2025-4427 and CVE-2025-4428

Sep 19, 2025 Data Breach / Vulnerability
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Thursday released details of two sets of malware that were discovered in an unnamed organization's network following the exploitation of security flaws in Ivanti Endpoint Manager Mobile (EPMM). "Each set contains loaders for malicious listeners that enable cyber threat actors to run arbitrary code on the compromised server," CISA said in an alert. The vulnerabilities that were exploited in the attack include CVE-2025-4427 and CVE-2025-4428 , both of which have been abused as zero-days prior to them being addressed by Ivanti in May 2025. While CVE-2025-4427 concerns an authentication bypass that allows attackers to access protected resources, CVE-2025-4428 enables remote code execution. As a result, the two flaws could be chained to execute arbitrary code on a vulnerable device without authentication. According to CISA, the threat actors gained access to server running EPMM by combing the two vulner...
Google Patches Chrome Zero-Day CVE-2025-10585 as Active V8 Exploit Threatens Millions

Google Patches Chrome Zero-Day CVE-2025-10585 as Active V8 Exploit Threatens Millions

Sep 18, 2025 Vulnerability / Browser Security
Google on Wednesday released security updates for the Chrome web browser to address four vulnerabilities, including one that it said has been exploited in the wild. The zero-day vulnerability in question is CVE-2025-10585 , which has been described as a type confusion issue in the V8 JavaScript and WebAssembly engine. Type confusion vulnerabilities can have severe consequences as they can be weaponized by bad actors to trigger unexpected software behavior, resulting in the execution of arbitrary code and program crashes. Google's Threat Analysis Group (TAG) has been credited with discovering and reporting the flaw on September 16, 2025. As is typically the case, the company did not share any additional specifics about how the vulnerability is being abused in real-world attacks, by whom, or the scale of such efforts. This is done to prevent other threat actors from exploiting the issue before users can apply a fix. "Google is aware that an exploit for CVE-2025-10585 exis...
⚡ Weekly Recap: Bootkit Malware, AI-Powered Attacks, Supply Chain Breaches, Zero-Days & More

⚡ Weekly Recap: Bootkit Malware, AI-Powered Attacks, Supply Chain Breaches, Zero-Days & More

Sep 15, 2025 Cybersecurity / Hacking News
In a world where threats are persistent, the modern CISO's real job isn't just to secure technology—it's to preserve institutional trust and ensure business continuity. This week, we saw a clear pattern: adversaries are targeting the complex relationships that hold businesses together, from supply chains to strategic partnerships. With new regulations and the rise of AI-driven attacks, the decisions you make now will shape your organization's resilience for years to come. This isn't just a threat roundup; it's the strategic context you need to lead effectively. Here's your full weekly recap, packed with the intelligence to keep you ahead. ⚡ Threat of the Week New HybridPetya Ransomware Bypasses UEFI Secure Boot — A copycat version of the infamous Petya/NotPetya malware dubbed HybridPetya has been spotted. But no telemetry exists to suggest HybridPetya has been deployed in the wild yet. It also differs in one key respect: It can compromise the secure boot featu...
Samsung Fixes Critical Zero-Day CVE-2025-21043 Exploited in Android Attacks

Samsung Fixes Critical Zero-Day CVE-2025-21043 Exploited in Android Attacks

Sep 12, 2025 Vulnerability / Mobile Security
Samsung has released its monthly security updates for Android, including a fix for a security vulnerability that it said has been exploited in zero-day attacks. The vulnerability, CVE-2025-21043 (CVSS score: 8.8), concerns an out-of-bounds write that could result in arbitrary code execution. "Out-of-bounds Write in libimagecodec.quram.so prior to SMR Sep-2025 Release 1 allows remote attackers to execute arbitrary code," Samsung said in an advisory. "The patch fixed the incorrect implementation." According to a 2020 report from Google Project Zero, libimagecodec.quram.so is a closed-source image parsing library developed by Quramsoft that implements support for various image formats. The critical-rated issue, per the South Korean electronics giant, affects Android versions 13, 14, 15, and 16. The vulnerability was privately disclosed to the company on August 13, 2025. Samsung did not share any specifics on how the vulnerability is being exploited in attacks...
Apple Warns French Users of Fourth Spyware Campaign in 2025, CERT-FR Confirms

Apple Warns French Users of Fourth Spyware Campaign in 2025, CERT-FR Confirms

Sep 12, 2025
Apple has notified users in France of a spyware campaign targeting their devices, according to the Computer Emergency Response Team of France (CERT-FR). The agency said the alerts were sent out on September 3, 2025, making it the fourth time this year that Apple has notified citizens in the county that at least one of the devices linked to their iCloud accounts may have been compromised as part of highly-targeted attacks. The agency did not share further details on what triggered these alerts. Previous threat notifications were sent on March 5, April 29 , and June 25. Apple has been sending these notices since November 2021. "These complex attacks target individuals for their status or function: journalists, lawyers, activists, politicians, senior officials, members of steering committees of strategic sectors, etc," CERT-FR said. The development comes less than a month after it emerged that a security flaw in WhatsApp ( CVE-2025-55177 , CVSS score: 5.4) was chained wi...
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