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Citrix has released security updates to address a critical flaw affecting NetScaler ADC that it said has been exploited in the wild. The vulnerability, tracked as CVE-2025-6543 , carries a CVSS score of 9.2 out of a maximum of 10.0. It has been described as a case of memory overflow that could result in unintended control flow and denial-of-service. However, successful exploitation requires the appliance to be configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server. The shortcoming impacts the below versions - NetScaler ADC and NetScaler Gateway 14.1 prior to 14.1-47.46  NetScaler ADC and NetScaler Gateway 13.1 prior to 13.1-59.19 NetScaler ADC and NetScaler Gateway 12.1 and 13.0 (vulnerable and end-of-life) NetScaler ADC 13.1-FIPS and NDcPP prior to 13.1-37.236-FIPS and NDcPP "Secure Private Access on-prem or Secure Private Access Hybrid deployments using NetScaler instances are also affected by the vulnerabilities," Citrix ...

The U.S. National Security Agency (NSA) on Tuesday  said  a threat actor tracked as APT5 has been actively exploiting a zero-day flaw in Citrix Application Delivery Controller (ADC) and Gateway to take over affected systems. The critical remote code execution vulnerability, identified as  CVE-2022-27518 , could allow an unauthenticated attacker to execute commands remotely on vulnerable devices and seize control. Successful exploitation, however, requires that the Citrix ADC or Citrix Gateway appliance is configured as a SAML service provider (SP) or a SAML identity provider (IdP). The following supported versions of Citrix ADC and Citrix Gateway are affected by the vulnerability - Citrix ADC and Citrix Gateway 13.0 before 13.0-58.32 Citrix ADC and Citrix Gateway 12.1 before 12.1-65.25 Citrix ADC 12.1-FIPS before 12.1-55.291 Citrix ADC 12.1-NDcPP before 12.1-55.291 Citrix ADC and Citrix Gateway versions 13.1 are not impacted. The company also said there are no...

Cybersecurity researchers have detailed two now-patched security flaws in SAP Graphical User Interface (GUI) for Windows and Java that, if successfully exploited, could have enabled attackers to access sensitive information under certain conditions. The vulnerabilities, tracked as CVE-2025-0055 and CVE-2025-0056 (CVSS scores: 6.0), were patched by SAP as part of its monthly updates for January 2025 . "The research discovered that SAP GUI input history is stored insecurely, both in the Java and Windows versions," Pathlock researcher Jonathan Stross said in a report shared with The Hacker News. SAP GUI user history allows users to access previously entered values in input fields with the goal of saving time and reducing errors. This historical information is stored locally on devices. This can include usernames, national IDs, social security numbers (SSNs), bank account numbers, and internal SAP table names. The vulnerabilities identified by Pathlock are rooted in th...

Citrix yesterday issued new security patches for as many as 11 security flaws that affect its Citrix Application Delivery Controller (ADC), Gateway, and SD-WAN WAN Optimization edition (WANOP) networking products. Successful exploitation of these critical flaws could let unauthenticated attackers perform code injection, information disclosure, and even denial-of-service attacks against the gateway or the authentication virtual servers . Citrix confirmed that the aforementioned issues do not impact other virtual servers, such as load balancing and content switching virtual servers. Among the affected Citrix SD-WAN WANOP appliances include models 4000-WO, 4100-WO, 5000-WO, and 5100-WO. The networking vendor also reiterated that these vulnerabilities were not connected to a previously fixed zero-day NetScaler flaw (tagged as CVE-2019-19781 ) that allowed bad actors to perform arbitrary code execution even without proper authentication. It also said there's no evidence ...

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) issued an advisory on Thursday warning that the newly disclosed critical security flaw in Citrix NetScaler Application Delivery Controller (ADC) and Gateway devices is being abused to drop web shells on vulnerable systems. "In June 2023, threat actors exploited this vulnerability as a zero-day to drop a web shell on a critical infrastructure organization's non-production environment NetScaler ADC appliance," the agency  said . "The web shell enabled the actors to perform discovery on the victim's active directory (AD) and collect and exfiltrate AD data. The actors attempted to move laterally to a domain controller but network segmentation controls for the appliance blocked movement." The shortcoming in question is  CVE-2023-3519  (CVSS score: 9.8), a code injection bug that could result in unauthenticated remote code execution. Citrix, earlier this week, released patches for the issue and ...

Citrix today released patches for multiple new security vulnerabilities affecting its Citrix Endpoint Management (CEM) , also known as XenMobile, a product made for enterprises to help companies manage and secure their employees' mobile devices remotely. Citrix Endpoint Management offers businesses mobile device management (MDM) and mobile application management (MAM) capabilities. It allows companies to control which apps their employees can install while ensuring updates and security settings are applied to keep business information protected. According to Citrix, there are a total of 5 vulnerabilities that affect on-premise instances of XenMobile servers used in enterprises to manage all apps, devices, or platforms from one central location. "Remediations have already been applied to cloud versions, but hybrid rights users need to apply the upgrades to any on-premises instance," the company sai d in a post today. If left unpatched and exploited successfully,...

Virtualization services provider VMware has alerted customers to the existence of a proof-of-concept (PoC) exploit for a recently patched security flaw in Aria Operations for Logs. Tracked as CVE-2023-34051 (CVSS score: 8.1), the high-severity vulnerability relates to a case of authentication bypass that could lead to remote code execution. "An unauthenticated, malicious actor can inject files into the operating system of an impacted appliance which can result in remote code execution," VMware  noted  in an advisory on October 19, 2023. James Horseman from Horizon3.ai and the Randori Attack Team have been credited with discovering and reporting the flaw. Horizon3.ai has since made available a  PoC for the vulnerability , prompting VMware to revise its advisory this week. It's worth noting that CVE-2023-34051 is a patch bypass for a  set of critical flaws  that were addressed by VMware earlier this January that could expose users to remote code execution at...

Cyber operatives affiliated with the Russian Foreign Intelligence Service (SVR) have switched up their tactics in response to previous public disclosures of their attack methods, according to a  new advisory  jointly published by intelligence agencies from the U.K. and U.S. Friday. "SVR cyber operators appear to have reacted [...] by changing their TTPs in an attempt to avoid further detection and remediation efforts by network defenders," the National Cyber Security Centre (NCSC)  said . These include the deployment of an open-source tool called  Sliver  to maintain their access to compromised victims as well as leveraging the ProxyLogon flaws in Microsoft Exchange servers to conduct post-exploitation activities. The development follows the  public attribution  of SVR-linked actors to the  SolarWinds  supply-chain attack last month. The adversary is also tracked under different monikers, such as Advanced Persistent Threat 29 (APT29), t...

Not every risk looks like an attack. Some problems start as small glitches, strange logs, or quiet delays that don't seem urgent—until they are. What if your environment is already being tested, just not in ways you expected? Some of the most dangerous moves are hidden in plain sight. It's worth asking: what patterns are we missing, and what signals are we ignoring because they don't match old playbooks? This week's reports bring those quiet signals into focus—from attacks that bypassed MFA using trusted tools, to supply chain compromises hiding behind everyday interfaces. Here's what stood out across the cybersecurity landscape: ⚡ Threat of the Week Cloudflare Blocks Massive 7.3 Tbps DDoS Attack — Cloudflare said it autonomously blocked the largest distributed denial-of-service (DDoS) attack ever recorded, which hit a peak of 7.3 terabits per second (Tbps). The attack, the company said, targeted an unnamed hosting provider and delivered 37.4 terabytes in 45 seconds. It origi...

Behind every click, there's a risk waiting to be tested. A simple ad, email, or link can now hide something dangerous. Hackers are getting smarter, using new tools to sneak past filters and turn trusted systems against us. But security teams are fighting back. They're building faster defenses, better ways to spot attacks, and stronger systems to keep people safe. It's a constant race — every move by attackers sparks a new response from defenders. In this week's ThreatsDay Bulletin, we look at the latest moves in that race — from new malware and data leaks to AI tools, government actions, and major security updates shaping the digital world right now. U.K. moves to tighten cyber rules for key sectors U.K. Debuts Cyber Security and Resilience Bill The U.K. government has proposed a new Cyber Security and Resilience Bill that aims to strengthen national security and secure public services like healthcare, drinking wat...

The U.S. and U.K. on Thursday formally attributed the supply chain attack of IT infrastructure management company SolarWinds with "high confidence" to government operatives working for Russia's Foreign Intelligence Service (SVR). "Russia's pattern of malign behaviour around the world – whether in cyberspace, in election interference or in the aggressive operations of their intelligence services – demonstrates that Russia remains the most acute threat to the U.K.'s national and collective security," the U.K. government  said  in a statement. To that effect, the U.S. Department of the Treasury has imposed sweeping sanctions against Russia for "undermining the conduct of free and fair elections and democratic institutions" in the U.S. and for its role in facilitating the sprawling SolarWinds hack, while also barring six technology companies in the country that provide support to the cyber program run by Russian Intelligence Services. The com...

This past week has been packed with unsettling developments in the world of cybersecurity. From silent but serious attacks on popular business tools to unexpected flaws lurking in everyday devices, there's a lot that might have flown under your radar. Attackers are adapting old tricks, uncovering new ones, and targeting systems both large and small. Meanwhile, law enforcement has scored wins against some shady online marketplaces, and technology giants are racing to patch problems before they become a full-blown crisis. If you've been too busy to keep track, now is the perfect time to catch up on what you may have missed. ⚡ Threat of the Week Cleo Vulnerability Comes Under Active Exploitation — A critical vulnerability (CVE-2024-50623) in Cleo's file transfer software—Harmony, VLTrader, and LexiCom—has been actively exploited by cybercriminals , creating major security risks for organizations worldwide. The flaw enables attackers to execute code remotely without authorization...

UTM (Unified threat management) is thought to be an all-in-one solution for cybersecurity. In general, it is a versatile software or hardware firewall solution integrated with IPS (Intrusion Prevention System) and other security services. A universal gateway allows the user to manage network security with one comprehensive solution, which makes the task much easier. In addition, compared to a conventional firewall, such systems are capable of detecting and blocking more sophisticated attacks. SafeDNS has recently released such a solution, and this is what this article is going to be about. Who needs UTMs? Most of all, UTMs are valued by SMEs - the all-in-one solution makes it simple to manage all their cybersecurity solutions and services. This also cuts down a lot of communications between vendors, since UTMs are easily supported by one IT team. This leads to another upside of the system - it can be cost-effective, as there is no need to pay a bunch of vendors & extra for tech ...