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Over 28,000 Citrix devices vulnerable to new exploited RCE flaw

bleepingcomputer.com Unknown 2025-10-25 10:48:00

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 been exploited as a zero-day vulnerability. The versions affected by CVE-2025-7775 are 14.1 be

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Citrix fixes critical NetScaler RCE flaw exploited in zero-day attacks

bleepingcomputer.com Unknown 2025-10-26 17:37:53

Citrix fixed three NetScaler ADC and NetScaler Gateway flaws today, including a critical remote code execution flaw tracked as CVE-2025-7775 that was actively exploited in attacks as a zero-day vulnerability. The CVE-2025-7775 flaw is a memory overflow bug that can lead to unauthenticated, remote code execution on vulnerable devices. In an advisory released today, Citrix states that this flaw was observed being exploited in attacks on unpatched devices. "As of August 26, 2025 Cloud Software G

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Over 3,000 NetScaler devices left unpatched against CitrixBleed 2 bug

bleepingcomputer.com Unknown 2025-11-22 18:31:49

Over 3,300 Citrix NetScaler devices remain unpatched against a critical vulnerability that allows attackers to bypass authentication by hijacking user sessions, nearly two months after patches were released. Tracked as CVE-2025-5777 and referred to as CitrixBleed 2, this out-of-bounds memory read vulnerability results from insufficient input validation, enabling unauthenticated attackers to access restricted memory regions remotely on devices configured as a Gateway (VPN virtual server, ICA Pro

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Netherlands: Citrix Netscaler flaw CVE-2025-6543 exploited to breach orgs

bleepingcomputer.com Unknown 2025-11-24 14:19:49

The Netherlands' National Cyber Security Centre (NCSC) is warning that a critical Citrix NetScaler vulnerability tracked as CVE-2025-6543 was exploited to breach "critical organizations" in the country. The critical flaw is a memory overflow bug that allows unintended control flow or a denial of service state on impacted devices. "Memory overflow vulnerability leading to unintended control flow and Denial of Service in NetScaler ADC and NetScaler Gateway when configured as Gateway (VPN virtual

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Citrix Bleed 2 exploited weeks before PoCs as Citrix denied attacks

bleepingcomputer.com Unknown 2026-01-08 18:37:34

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. GreyNoise has confirmed its honeypots detected targeted exploitation from IP addresses located in China on June 23, 2025. "GreyNoise has observed active exploitation attempts against CVE-2025-5777 (CitrixBleed 2), a memory overread vulnerabili

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CISA warns hackers are actively exploiting critical ‘Citrix Bleed 2’ security flaw

techcrunch.com Zack Whittaker 2026-01-20 17:37:31

U.S. cybersecurity agency CISA says hackers are actively exploiting a critical-rated security flaw in a widely used Citrix product, and has given other federal government departments just one day to patch their systems. Security researchers have dubbed the bug “Citrix Bleed 2” for its similarity to a 2023 security flaw in Citrix NetScaler, a networking product that large companies and governments rely on for allowing their staff to remotely access apps and other resources on their internal netw

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CISA confirms hackers are actively exploiting critical ‘Citrix Bleed 2’ bug

techcrunch.com Zack Whittaker 2026-01-20 23:37:31

U.S. cybersecurity agency CISA says hackers are actively exploiting a critical-rated security flaw in a widely used Citrix product, and has given other federal government departments just one day to patch their systems. Security researchers have dubbed the bug “Citrix Bleed 2” for its similarity to a 2023 security flaw in Citrix NetScaler, a networking product that large companies and governments rely on for allowing their staff to remotely access apps and other resources on their internal netw

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CISA tags Citrix Bleed 2 as exploited, gives agencies a day to patch

bleepingcomputer.com Unknown 2026-01-21 09:45:57

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 the attacks exploiting the security issue. The agency added the flaw to its Known Exploited Vulnerabiliti

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Critical CitrixBleed 2 vulnerability has been under active exploit for weeks

arstechnica.com Unknown 2026-01-27 08:20:24

A critical vulnerability allowing hackers to bypass multifactor authentication in network management devices made by Citrix has been actively exploited for more than a month, researchers said. The finding is at odds with advisories from the vendor saying there is no evidence of in-the-wild exploitation. Tracked as CVE-2025-5777, the vulnerability shares similarities with CVE-2023-4966, a security flaw nicknamed CitrixBleed, which led to the compromise of 20,000 Citrix devices two years ago. The

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Public exploits released for Citrix Bleed 2 NetScaler flaw, patch now

bleepingcomputer.com Unknown 2026-01-30 05:57:37

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. The CitrixBleed 2 vulnerability, which affects Citrix NetScaler ADC and Gateway devices, allows attackers to retrieve memory contents simply by sending malformed POST requests during login attempts. This critical flaw is named CitrixBleed2 as it close

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Public exploits released for CitrixBleed 2 NetScaler flaw, patch now

bleepingcomputer.com Unknown 2026-01-30 23:57:37

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. The CitrixBleed 2 vulnerability, which affects Citrix NetScaler ADC and Gateway devices, allows attackers to retrieve memory contents simply by sending malformed POST requests during login attempts. This flaw is named CitrixBleed2 as it closely resemb

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Over 1,200 Citrix servers unpatched against critical auth bypass flaw

bleepingcomputer.com Unknown 2026-02-16 00:47:38

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. Tracked as CVE-2025-5777 and referred to as Citrix Bleed 2, this out-of-bounds memory read vulnerability results from insufficient input validation, enabling unauthenticated attackers to access restricted memory regions. A similar Citrix security flaw, dubbed

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Citrix Bleed 2 flaw now believed to be exploited in attacks

bleepingcomputer.com Unknown 2026-02-17 14:18:09

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. Citrix Bleed 2, named by cybersecurity researcher Kevin Beaumont due to its similarity to the original Citrix Bleed (CVE-2023-4966), is an out-of-bounds memory read vulnerability that allows unauthenticated attackers to access portions of memory that should typically

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Citrix warns of NetScaler vulnerability exploited in DoS attacks

bleepingcomputer.com Unknown 2026-02-22 14:35:55

Citrix is warning that a vulnerability in NetScaler appliances tracked as CVE-2025-6543 is being actively exploited in the wild, causing devices to enter a denial of service condition. "Exploits of CVE-2025-6543 on unmitigated appliances have been observed," warns Citrix's advisory. Tracked internally as CTX694788, CVE-2025-6543 is a critical flaw impacting NetScaler ADC and NetScaler Gateway and can be triggered by unauthenticated, remote requests, leading the appliance to go offline. The fl

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