Tag: citrix
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Public exploits released for Citrix Bleed 2 NetScaler flaw, patch now
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. First seen on bleepingcomputer.com Jump to article: www.bleepingcomputer.com/news/security/public-exploits-released-for-citrixbleed-2-netscaler-flaw-patch-now/
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Public exploits released for CitrixBleed 2 NetScaler flaw, patch now
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. First seen on bleepingcomputer.com Jump to article: www.bleepingcomputer.com/news/security/public-exploits-released-for-citrixbleed-2-netscaler-flaw-patch-now/
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Researchers Share CitrixBleed 2 Detection Analysis After Initial Hold
Vulnerability research company WatchTowr published a detection analysis for the Citrix Blled 2 flaw First seen on infosecurity-magazine.com Jump to article: www.infosecurity-magazine.com/news/citrixbleed-2-detection-analysis/
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CitrixBleed 2 Vulnerability PoC Published Experts Warn of Mass Exploitation Risk
A newly published proof-of-concept (PoC) for the critical CitrixBleed 2 vulnerability (CVE-2025-5777) has sent shockwaves through the cybersecurity community, with experts warning of imminent mass exploitation risks for organizations using Citrix NetScaler ADC and Gateway devices. The Vulnerability: CitrixBleed 2 (CVE-2025-5777) Dubbed “CitrixBleed 2” for its eerie resemblance to the notorious CitrixBleed flaw of 2023,…
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Citrix Alerts on Authentication Failures After NetScaler Update to Resolve Auth Vulnerability
Citrix has issued an urgent advisory for NetScaler users following the release of builds 14.1.47.46 and 13.1.59.19, warning of potential authentication disruptions stemming from a 16c3 a newly implemented security feature. As part of Citrix’s secure-by-design and secure-by-default initiative, the Content Security Policy (CSP) header has been enabled by default in these builds to bolster…
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Citrix warns of login issues after NetScaler auth bypass patch
Citrix warns that patching recently disclosed vulnerabilities that can be exploited to bypass authentication and launch denial-of-service attacks may also break login pages on NetScaler ADC and Gateway appliances. First seen on bleepingcomputer.com Jump to article: www.bleepingcomputer.com/news/security/citrix-warns-of-login-issues-after-netscaler-auth-bypass-patch/
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In NetScaler ADC und Gateway – Citrix veröffentlicht Notfall-Patches für kritische Schwachstellen
First seen on security-insider.de Jump to article: www.security-insider.de/citrix-behebt-kritische-schwachstellen-netscaler-adc-gateway-a-4152191fa1b8283e6faebf77dd49f265/
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Thousands of Citrix NetScaler instances remain vulnerable to actively exploited bugs
First seen on scworld.com Jump to article: www.scworld.com/brief/thousands-of-citrix-netscaler-instances-remain-vulnerable-to-actively-exploited-bugs
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CISA Issues Alert on Actively Exploited Citrix NetScaler ADC and Gateway Vulnerability
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has issued an urgent alert following the addition of a critical Citrix NetScaler vulnerability”, CVE-2025-6543″, to its Known Exploited Vulnerabilities (KEV) Catalog, citing evidence of active exploitation in the wild. Vulnerability Details CVE-2025-6543 is abuffer overflow vulnerabilityaffecting Citrix NetScaler ADC and NetScaler Gateway appliances when configured as…
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Attacks involving critical Citrix NetScaler bug underway
First seen on scworld.com Jump to article: www.scworld.com/brief/attacks-involving-critical-citrix-netscaler-bug-underway
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U.S. CISA adds Citrix NetScaler flaw to its Known Exploited Vulnerabilities catalog
U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds Citrix NetScalervulnerability to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA)added Citrix NetScaler vulnerability, tracked as CVE-2025-6543, to its Known Exploited Vulnerabilities (KEV) catalog. CVE-2025-6543 (CVSS score of 9.2) is a memory overflow vulnerability in NetScaler ADC and NetScaler Gateway when configured…
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CitrixBleed 2 might be actively exploited (CVE-2025-5777)
While Citrix has observed some instances where CVE-2025-6543 has been exploited on vulnerable NetScaler networking appliances, the company still says that they don’t … First seen on helpnetsecurity.com Jump to article: www.helpnetsecurity.com/2025/06/30/citrixbleed-2-might-be-actively-exploited-cve-2025-5777/
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Patch now: Citrix Bleed 2 vulnerability actively exploited in the wild
Indications of real-world exploitation: ReliaQuest researchers said that, in multiple incidents, attackers were seen hijacking active Citrix web sessions and bypassing multi-factor authentication (MFA) without requiring user credentials. The research also highlighted “session reuse across multiple IPs, including combinations of expected and suspicious IPs.”In compromised environments, attackers proceeded with post-authentication reconnaissance, issuing lightweight directory access…
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Citrix Bleed Teil 2: Wird Schwachstelle CVE-20255777 bereits ausgenutzt?
Die Tage hatte ich über gravierende Schwachstellen in Citrix NetScaler ADC und das NetScaler Gateway berichtet, die zeitnah gepatcht werden sollten. Zum 23. Juni 2025 wurde die Beschreibung der Sicherheitslücke CVE-20255777 (CVSS 9.3) geändert, diese ist noch kritischer als gedacht. … First seen on borncity.com Jump to article: www.borncity.com/blog/2025/06/30/citrix-bleed-teil-2-wird-schwachstelle-cve-2025-5777-bereits-ausgenutzt/
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Over 1,200 Citrix servers unpatched against critical auth bypass flaw
Over 1,200 Citrix NetScaler ADC and NetScaler Gateway appliances exposed online are unpatched against a critical vulnerability believed to be actively exploited, allowing threat actors to bypass authentication by hijacking user sessions. First seen on bleepingcomputer.com Jump to article: www.bleepingcomputer.com/news/security/over-1-200-citrix-servers-unpatched-against-critical-auth-bypass-flaw/
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âš¡ Weekly Recap: Airline Hacks, Citrix 0-Day, Outlook Malware, Banking Trojans and more
Ever wonder what happens when attackers don’t break the rules”, they just follow them better than we do? When systems work exactly as they’re built to, but that “by design” behavior quietly opens the door to risk?This week brings stories that make you stop and rethink what’s truly under control. It’s not always about a…
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CVE-2025-5777, CVE-2025-6543: Frequently Asked Questions About CitrixBleed 2 and Citrix NetScaler Exploitation
Frequently asked questions about recent Citrix NetScaler ADC and Gateway vulnerabilities that have reportedly been exploited in the wild, including CVE-2025-5777 known as CitrixBleed 2. Background Tenable’s Research Special Operations (RSO) team has compiled this blog to answer Frequently Asked Questions (FAQ) regarding CVE-2025-5777 and CVE-2025-6543, two Citrix NetScaler ADC and Gateway vulnerabilities that have…
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Hackers exploiting critical Citrix Netscaler flaw, researchers say
After confirming exploitation of a separate zero-day flaw, Cloud Software Group promises to be transparent. First seen on cybersecuritydive.com Jump to article: www.cybersecuritydive.com/news/hackers-exploiting-citrix-netscaler-flaw/751878/
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Citrix Bleed 2 flaw now believed to be exploited in attacks
A critical NetScaler ADC and Gateway vulnerability dubbed “Citrix Bleed 2” (CVE-2025-5777) is now likely exploited in attacks, according to cybersecurity firm ReliaQuest, seeing an increase in suspicious sessions on Citrix devices. First seen on bleepingcomputer.com Jump to article: www.bleepingcomputer.com/news/security/citrix-bleed-2-flaw-now-believed-to-be-exploited-in-attacks/
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Critical Citrix Bleed 2 flaw now likely exploited in attacks
A critical NetScaler ADC and Gateway vulnerability dubbed “Citrix Bleed 2” (CVE-2025-5777) is now likely exploited in attacks, according to cybersecurity firm ReliaQuest, seeing an increase in suspicious sessions on Citrix devices. First seen on bleepingcomputer.com Jump to article: www.bleepingcomputer.com/news/security/critical-citrix-bleed-2-flaw-now-likely-exploited-in-attacks/
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Citrix patches critical 0-day amid ‘CitrixBleed 2’ concerns
First seen on scworld.com Jump to article: www.scworld.com/news/citrix-patches-critical-0-day-amid-citrixbleed-2-concerns
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Breach Roundup: UK NHS Links Patient Death to Ransomware Attack
Also, O Canada, Oh Brother and More Probable Chinese Hacking. This week, ransomware kills, Salt Typhoon hit Canada, Russian backdoors, SAP and Citrix patches, China hackers in the oil and energy sector. Brother printers have an unfixable flaw. Ransomware hit a U.S. dairy cooperative. Hackers in Albania and Oxford. European lawmakers heard cybersecurity advice. First…
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Jetzt patchen: Citrix warnt vor teils aktiv ausgenutzten Sicherheitslücken
Tags: citrixIn Citrix-Netscaler-Instanzen klaffen mehrere gefährliche Sicherheitslücken. Eine erinnert an Citrix Bleed, eine andere wird bereits ausgenutzt. First seen on golem.de Jump to article: www.golem.de/news/dringend-patchen-citrix-warnt-vor-aktiv-ausgenutzter-sicherheitsluecke-2506-197477.html
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Dringend patchen: Citrix warnt vor aktiv ausgenutzter Sicherheitslücke
In Citrix-Netscaler-Instanzen klaffen mehrere gefährliche Sicherheitslücken. Eine erinnert an Citrix Bleed, eine andere wird bereits ausgenutzt. First seen on golem.de Jump to article: www.golem.de/news/dringend-patchen-citrix-warnt-vor-aktiv-ausgenutzter-sicherheitsluecke-2506-197477.html
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CitrixBleed 2: The nightmare that echoes the ‘CitrixBleed’ flaw in Citrix NetScaler devices
New Citrix flaw ‘CitrixBleed 2’ lets attackers steal session cookies without logging in, echoing a previously exploited vulnerability. A new flaw in Citrix NetScaler ADC and Gateway, dubbed ‘CitrixBleed 2’ (CVE-2025-5777, CVSS v4.0 Base Score of 9.3), can allow unauthenticated attackers to steal session cookies, similar to a past critical exploit. The vulnerability is an…
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Dringend patchen: Gefährliche Citrix-Lücken werden teilweise aktiv ausgenutzt
Tags: citrixIn Citrix-Netscaler-Instanzen klaffen mehrere gefährliche Sicherheitslücken. Eine erinnert an Citrix Bleed, eine andere wird bereits ausgenutzt. First seen on golem.de Jump to article: www.golem.de/news/dringend-patchen-citrix-warnt-vor-aktiv-ausgenutzter-sicherheitsluecke-2506-197477.html
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Citrix users hit by actively exploited zero-day vulnerability
The vendor disclosed the critical zero-day in NetScaler ADC and NetScaler Gateway nine days after it warned of a pair of defects in the same products. First seen on cyberscoop.com Jump to article: cyberscoop.com/citrix-zero-day-netscaler/
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Citrix bleeds again: This time a zero-day exploited – patch now
Two emergency patches issued in two weeks First seen on theregister.com Jump to article: www.theregister.com/2025/06/25/citrix_netscaler_critical_bug_exploited/
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Citrix warns of exploitation of Netscaler devices through new bugs
Citrix is sounding the alarm about vulnerabilities affecting Netscaler products that security researchers say are reminiscent of the widely exploited “Citrix Bleed” bug. First seen on therecord.media Jump to article: therecord.media/citrix-warns-netscaler-exploitation-bug