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Attackers wasted little time targeting the latest memory disclosure flaw in Citrix's NetScaler products, after researchers published a proof-of-concept exploit (PoC).
A recently disclosed critical security flaw impacting Citrix NetScaler ADC and NetScaler Gateway is witnessing active reconnaissance activity, according to Defused Cyber and watchTowr
HexStrike-AI Connects LLMs to Over 150 Existing Security ToolsA red-team framework released for penetration testing has become a weapon in the wild, repurposed by hackers to accelerate exploitation of newly disclosed Citrix vulnerabilities. Check Point Research observed chatter suggesting n-day attacks may unfold in minutes, shrinking defender response time.
Threat actors are attempting to leverage a newly released artificial intelligence (AI) offensive security tool called HexStrike AI to exploit recently disclosed security flaws
Citrix Publishes Patches After Attackers Exploit Memory Overflow VulnerabilityNetScaler customers of virtualization giant Citrix once again should patch immediately to stymie the hackers exploiting a zero-day. Citrix warned Tuesday that hackers are using a memory overflow vulnerability now tracked as CVE-2025-7775. The vulnerability carries a CVSS score of 9.2.
A critical Citrix NetScaler vulnerability, tracked as CVE-2025-5777 and dubbed "CitrixBleed 2," was actively exploited nearly two weeks before proof-of-concept (PoC) exploits were made public, despite Citrix stating that there was no evidence of attacks. [...]
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Thursday added a critical security flaw impacting Citrix NetScaler ADC and Gateway to its Known Exploited Vulnerabilities (KEV) catalog, officially confirming the vulnerability has been weaponized in the wild
Researchers have released proof-of-concept (PoC) exploits for a critical Citrix NetScaler vulnerability, tracked as CVE-2025-5777 and dubbed CitrixBleed2, warning that the flaw is easily exploitable and can successfully steal user session tokens. [...]
Citrix Issues Patches to Counter Active Attacks Against Two Critical VulnerabilitiesAdministrators of Citrix Netscaler devices are being urged to immediately patch their devices to fix two actively exploited vulnerabilities. One, dubbed Citrix Bleed 2, can be abused by hackers to bypass multifactor authentication, hijack user sessions and gain unauthorized access to the equipment.
AG Says HealthAlliance Tried But Failed to Fix Zero-Day Flaw That Led to ExploitNew York State has levied a $550,000 fine against a healthcare group that tried - but failed - to patch a critical zero-day vulnerability in a Citrix NetScaler appliance used for telemedicine. Hackers exploited the flaw, stealing 196 gigabytes of data in an incident affecting 242,000 people.
'Once again, we've lost a little more faith in the internet,' researcher says Researchers are publicizing a proof of concept (PoC) exploit for what they're calling an unauthenticated remote code execution (RCE) vulnerability in Citrix's Virtual Apps and Desktops.…
Urgent Action Needed to Prevent Ransomware Attacks Involving Vulnerability ExploitA recent spike in ransomware attacks has prompted federal regulators and the American Hospital Association to issue urgent warnings to hospitals and other healthcare firms to prevent potential exploitation of the Citrix Bleed software flaw affecting some NetScaler ADC and NetScaler Gateway devices.
The Lockbit ransomware attacks use publicly available exploits for the Citrix Bleed vulnerability (CVE-2023-4966) to breach the systems of large organizations, steal data, and encrypt files. [...]
In the race over Citrix's latest vulnerability, the bad guys have a huge head start, with broad implications for businesses and critical infrastructure providers worldwide.
A proof-of-concept (PoC) exploit is released for the 'Citrix Bleed' vulnerability, tracked as CVE-2023-4966, that allows attackers to retrieve authentication session cookies from vulnerable Citrix NetScaler ADC and NetScaler Gateway appliances. [...]
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