Citrix Gateway
CISA orders feds to patch actively exploited Citrix flaw by Thursday
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) ordered government agencies to patch their Citrix NetScaler appliances against an actively exploited vulnerability by Thursday. Multiple cybersecurity companies flagged the flaw (CVE-2026-3055) as posing an increased risk of exploitation after Citrix released security updates on March 23, noting a technical resemblance to the widely exploited ‘CitrixBleed’ and ‘CitrixBleed2’ security issues. […]
Critical Citrix NetScaler memory flaw actively exploited in attacks
Hackers are exploiting a critical severity vulnerability, tracked as CVE-2026-3055, in Citrix NetScaler ADC and NetScaler Gateway appliances to obtain sensitive data. Citrix initially disclosed CVE-2026-3055 in a security bulletin on March 23, alongside a high-severity race condition flaw tracked as CVE-2026-4368. The issue impacts versions of the two products before 14.1-60.58, versions older than 13.1-62.23, and those older than […]
Citrix urges admins to patch NetScaler flaws as soon as possible
Citrix has patched two vulnerabilities affecting NetScaler ADC networking appliances and NetScaler Gateway secure remote access solutions, one of which is very similar to the CitrixBleed and CitrixBleed2 flaws exploited in zero-day attacks in recent years. The critical security bug (tracked as CVE-2026-3055) stems from insufficient input validation, which can lead to a memory overread on Citrix […]
Wave of Citrix NetScaler scans use thousands of residential proxies
A coordinated reconnaissance campaign targeting Citrix NetScaler infrastructure over the past week used tens of thousands of residential proxies to discover login panels. The activity was observed between January 28 and February 2, and it also focused on enumerating versions of the product, indicating an organized discovery effort. Threat monitoring platform GreyNoise traced the source of the […]
Over 28,000 Citrix devices vulnerable to new exploited RCE flaw
More than 28,200 Citrix instances are vulnerable to a critical remote code execution vulnerability tracked as CVE-2025-7775 that is already being exploited in the wild. The vulnerability affects NetScaler ADC and NetScaler Gateway and the vendor addressed it in updates released yesterday. According to the U.S. Cybersecurity and Infrastructure Security Agency (CISA) and Citrix, the security issue has […]
CISA tags Citrix Bleed 2 as exploited, gives agencies a day to patch
The U.S. Cybersecurity & Infrastructure Security Agency has confirmed active exploitation of the CitrixBleed 2 vulnerability (CVE-2025-5777) in Citrix NetScaler ADC and Gateway and is giving federal agencies one day to apply fixes. Such a short deadline for installing the patches is unprecedented since CISA released the Known Exploited Vulnerabilities (KEV) catalog, showing the severity of […]
New ‘CitrixBleed 2’ NetScaler flaw let hackers hijack sessions
A recent vulnerability in Citrix NetScaler ADC and Gateway is dubbed “CitrixBleed 2,” after its similarity to an older exploited flaw that allowed unauthenticated attackers to hijack authentication session cookies from vulnerable devices. Last week, Citrix published a security bulletin warning about flaws tracked as CVE-2025-5777 and CVE-2025-5349 that impact NetScaler ADC and Gateway versions before 14.1-43.56, releases before […]