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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).
Also, Lloyds Data Leak, Dutch Treasury Breach, Citrix Bug Exploit, Pay2Key ActivityThis week, Lloyds data leak hits 450K, Dutch treasury breach, Citrix flaw exploited, Iran-linked ransomware ops, TrueConf zero-day, Russian fraud ring sentenced, Romania targeted, patch gaps persist, and U.S. hospital breach affects 257K.
A recently disclosed critical security flaw impacting Citrix NetScaler ADC and NetScaler Gateway is witnessing active reconnaissance activity, according to Defused Cyber and watchTowr
ThreatsDay Bulletin is back on The Hacker News, and this week feels off in a familiar way. Nothing loud, nothing breaking everything at once. Just a lot of small things that shouldn’t work anymore but still do
Vendors (still) keep mum An "advanced" attacker exploited CitrixBleed 2 and a max-severity Cisco Identity Services Engine (ISE) bug as zero-days to deploy custom malware, according to Amazon Chief Information Security Officer CJ Moses.…
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. [...]
Ransomware Group Among Attackers Focused on Exploiting Citrix Netscaler FlawSecurity experts warn that attackers have ramped up their collective attempts to find and exploit Citrix NetScaler devices that remain unpatched. Cloud Security Group patched CVE-2025-5777, a flaw also known as "Citrix Bleed 2," nearly four weeks ago with a software update.
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
Add CISA to the list The US Cybersecurity and Infrastructure Security Agency has added its weighty name to the list of parties agreeing that CVE-2025-5777, dubbed CitrixBleed 2 by one researcher, has been under exploitation and abused to hijack user sessions.…
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. [...]
NetScaler vendor issued a patch but otherwise, stony silence Multiple exploits are circulating for CVE-2025-5777, a critical bug in Citrix NetScaler ADC and NetScaler Gateway dubbed CitrixBleed 2, and security analysts are warning a "significant portion" of users still haven't patched.…
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.…
Extortion Demands, Lawsuits Pile Up After Fred Hutchinson Cancer Center HackCybercriminals are extorting some patients and threatening them with swatting in the wake of a recent cyberattack on a Seattle cancer center. The incident, stemming from a Citrix Bleed exploit, has triggered multiple lawsuits and affected the personal data of at least 1 million people.
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.
LockBit and Nation-State Groups Using Session Tokens to Access Patched DevicesWith experts warning that NetScaler ADC and Gateway devices are being exploited by nation-state and cybercrime groups, the manufacturer has again urged all users to "patch immediately as well as terminate active sessions, which attackers can otherwise use to access devices even post-patch.