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The U.S. Cybersecurity and Infrastructure Security Agency (CISA) and National Security Agency (NSA), along with international partners from Australia and Canada, have released guidance to harden on-premise Microsoft Exchange Server instances from potential exploitation. "By restricting administrative access, implementing multi-factor authentication, enforcing strict transport security configurations, and adopting zero trust (ZT) security model principles, organizations can significantly bolster their defenses against potential cyber attacks," CISA said . The agencies said malicious activity aimed at Microsoft Exchange Server continues to take place, with unprotected and misconfigured instances facing the brunt of the attacks. Organizations are advised to decommission end-of-life on-premises or hybrid Exchange servers after transitioning to Microsoft 365. Some of the best practices outlined are listed below - Maintain security updates and patching cadence Migrate end-o...

An ongoing, widespread malware campaign has been observed installing rogue Google Chrome and Microsoft Edge extensions via a trojan distributed via fake websites masquerading as popular software. "The trojan malware contains different deliverables ranging from simple adware extensions that hijack searches to more sophisticated malicious scripts that deliver local extensions to steal private data and execute various commands," the ReasonLabs research team said in an analysis. "This trojan malware, existing since 2021, originates from imitations of download websites with add-ons to online games and videos." The malware and the extensions have a combined reach of at least 300,000 users of Google Chrome and Microsoft Edge, indicating that the activity has a broad impact. At the heart of the campaign is the use of malvertising to push lookalike websites promoting known software like Roblox FPS Unlocker, YouTube, VLC media player, Steam, or KeePass to trick users s...

Microsoft on Thursday released out-of-band security updates to patch a critical-severity Windows Server Update Services (WSUS) vulnerability with a proof-of-concept (Poc) exploit publicly available and has come under active exploitation in the wild. The vulnerability in question is CVE-2025-59287 (CVSS score: 9.8), a remote code execution flaw in WSUS that was originally fixed by the tech giant as part of its Patch Tuesday update published last week. Three security researchers, MEOW, f7d8c52bec79e42795cf15888b85cbad, and Markus Wulftange with CODE WHITE GmbH, have been acknowledged for discovering and reporting the bug. The shortcoming concerns a case of deserialization of untrusted data in WSUS that allows an unauthorized attacker to execute code over a network. It's worth noting that the vulnerability does not impact Windows servers that do not have the WSUS Server Role enabled. In a hypothetical attack scenario, a remote, unauthenticated attacker could send a crafted eve...

The Russia-linked nation-state threat actor tracked as  APT28  weaponized a security flaw in the Microsoft Windows Print Spooler component to deliver a previously unknown custom malware called GooseEgg. The post-compromise tool, which is said to have been used since at least June 2020 and possibly as early as April 2019, leveraged a now-patched flaw that allowed for privilege escalation (CVE-2022-38028, CVSS score: 7.8). It was  addressed  by Microsoft as part of updates released in October 2022, with the U.S. National Security Agency (NSA) credited for reporting the flaw at the time. According to new findings from the tech giant's threat intelligence team,  APT28  – also called Fancy Bear and Forest Blizzard (formerly Strontium) – weaponized the bug in attacks targeting Ukrainian, Western European, and North American government, non-governmental, education, and transportation sector organizations. "Forest ...

Microsoft closed out 2025 with patches for 56 security flaws in various products across the Windows platform, including one vulnerability that has been actively exploited in the wild. Of the 56 flaws, three are rated Critical, and 53 are rated Important in severity. Two other defects are listed as publicly known at the time of the release. These include 29 privilege escalation, 18 remote code execution, four information disclosure, three denial-of-service, and two spoofing vulnerabilities. In total, Microsoft has addressed a total of 1,275 CVEs in 2025, according to data compiled by Fortra. Tenable's Satnam Narang said 2025 also marks the second consecutive year where the Windows maker has patched over 1,000 CVEs. It's the third time it has done so since Patch Tuesday's inception. The update is in addition to 17 shortcomings the tech giant patched in its Chromium-based Edge browser since the release of the November 2025 Patch Tuesday update . This also consists of a s...

Government entities in Ukraine have been breached as part of a new campaign that leveraged trojanized versions of Windows 10 installer files to conduct post-exploitation activities. Mandiant, which discovered the "socially engineered supply chain" attack around mid-July 2022, said the malicious ISO files were distributed via Ukrainian- and Russian-language Torrent websites. It's tracking the threat cluster as  UNC4166 . "Upon installation of the compromised software, the malware gathers information on the compromised system and exfiltrates it," the cybersecurity company  said  in a technical deep dive published Thursday. Although the adversarial collective's provenance is unknown, the intrusions are said to have targeted organizations that were previously victims of disruptive wiper attacks attributed to  APT28 , a  Russian state-sponsored actor . The ISO file, per the Google-owned threat intelligence firm, was designed to disable the transmission of te...

Multiple state-sponsored hacking groups from Iran, North Korea, and Russia have been found leveraging the increasingly popular ClickFix social engineering tactic to deploy malware over a three-month period from late 2024 through the beginning of 2025. The phishing campaigns adopting the strategy have been attributed to clusters tracked as TA427 (aka Kimsuky), TA450 (aka MuddyWater), UNK_RemoteRogue, and TA422 (aka APT28). ClickFix has been an initial access technique primarily affiliated with cybercrime groups, although the effectiveness of the approach has led to it also being adopted by nation-state groups. "The incorporation of ClickFix is not revolutionizing the campaigns carried out by TA427, TA450, UNK_RemoteRogue, and TA422 but instead is replacing the installation and execution stages in existing infection chains," enterprise security firm Proofpoint said in a report published today. ClickFix , in a nutshell, refers to a sneaky technique that tricks users int...

This week saw a lot of new cyber trouble. Hackers hit Fortinet and Chrome with new 0-day bugs. They also broke into supply chains and SaaS tools. Many hid inside trusted apps, browser alerts, and software updates. Big firms like Microsoft, Salesforce, and Google had to react fast — stopping DDoS attacks, blocking bad links, and fixing live flaws. Reports also showed how fast fake news, AI risks, and attacks on developers are growing. Here's what mattered most in security this week. ⚡ Threat of the Week Fortinet Warns of Another Silently Patched and Actively Exploited FortiWeb Flaw — Fortinet has warned that a new security flaw in FortiWeb has been exploited in the wild. The medium-severity vulnerability, tracked as CVE-2025-58034, carries a CVSS score of 6.7 out of a maximum of 10.0. It has been addressed in version 8.0.2. "An Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability [CWE-78] in FortiWeb may allow an a...

Cybersecurity researchers have discovered a new computer virus associated with the Stealth Falcon state-sponsored cyber espionage group that abuses a built-in component of the Microsoft Windows operating system to stealthily exfiltrate stolen data to attacker-controlled server. Active since 2012, Stealth Falcon is a sophisticated hacking group known for targeting journalists, activists, and dissidents with spyware in the Middle East, primarily in the United Arab Emirates (UAE). Dubbed Win32/StealthFalcon , named after the hacking group, the malware communicates and sends collected data to its remote command-and-control (C&C) servers using Windows Background Intelligent Transfer Service (BITS). BITS is a communication protocol in Windows that takes unused network bandwidth to facilitate asynchronous, prioritized, and throttled transfer of files between machines in the foreground or background, without impacting the network experience. BITS is commonly used by software up...

A financially motivated threat actor codenamed UNC5142 has been observed abusing blockchain smart contracts as a way to facilitate the distribution of information stealers, such as Atomic (AMOS), Lumma, Rhadamanthys (aka RADTHIEF), and Vidar, targeting both Windows and Apple macOS systems. "UNC5142 is characterized by its use of compromised WordPress websites and 'EtherHiding,' a technique used to obscure malicious code or data by placing it on a public blockchain, such as the BNB Smart Chain," Google Threat Intelligence Group (GTIG) said in a report shared with The Hacker News. As of June 2025, Google said it flagged about 14,000 web pages containing injected JavaScript that exhibit behavior associated with an UNC5142, indicating indiscriminate targeting of vulnerable WordPress sites. However, the tech giant noted that it has not spotted any UNC5142 activity since July 23, 2025, either signaling a pause or an operational pivot. EtherHiding was first documented ...

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Friday formally added a critical security flaw impacting React Server Components (RSC) to its Known Exploited Vulnerabilities ( KEV ) catalog following reports of active exploitation in the wild. The vulnerability, CVE-2025-55182 (CVSS score: 10.0), relates to a case of remote code execution that could be triggered by an unauthenticated attacker without requiring any special setup. It's also tracked as React2Shell. "Meta React Server Components contains a remote code execution vulnerability that could allow unauthenticated remote code execution by exploiting a flaw in how React decodes payloads sent to React Server Function endpoints," CISA said in an advisory. The problem stems from insecure deserialization in the library's Flight protocol, which React uses to communicate between a server and client. As a result, it leads to a scenario where an unauthenticated, remote attacker can execute arbi...

A critical vulnerability has been discovered in Credential Security Support Provider protocol (CredSSP) that affects all versions of Windows to date and could allow remote attackers to exploit RDP and WinRM to steal data and run malicious code. CredSSP protocol has been designed to be used by RDP (Remote Desktop Protocol) and Windows Remote Management (WinRM) that takes care of securely forwarding credentials encrypted from the Windows client to the target servers for remote authentication. Discovered by researchers at Cybersecurity firm Preempt Security, the issue (CVE-2018-0886) is a logical cryptographic flaw in CredSSP that can be exploited by a man-in-the-middle attacker with Wi-Fi or physical access to the network to steal session authentication data and perform a Remote Procedure Call attack. When a client and server authenticate over RDP and WinRM connection protocols, a man-in-the-middle attacker can execute remote commands to compromise enterprise networks. "A...

⚠️ Imagine this: the very tools you trust to protect you online—your two-factor authentication, your car's tech system, even your security software—turned into silent allies for hackers. Sounds like a scene from a thriller, right? Yet, in 2024, this isn't fiction; it's the new cyber reality. Today's attackers have become so sophisticated that they're using our trusted tools as secret pathways, slipping past defenses without a 🔍 trace. For banks 🏦, this is especially alarming. Today's malware doesn't just steal codes; it targets the very trust that digital banking relies on. These threats are more advanced and smarter than ever, often staying a step ahead of defenses. And it doesn't stop there. Critical systems that power our cities are at risk too. Hackers are hiding within the very tools that run these essential services, making them harder to detect and harder to stop. It's a high-stakes game of hide-and-seek, where each move raises the risk. As these threats grow, let's dive ...