NetScaler

Citrix Urges Immediate Patching of Critical NetScaler Vulnerability

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Citrix Urges Immediate Patching of Critical NetScaler Vulnerability 2026-10-09 at 09:53 By Ionut Arghire The security defect, tracked as CVE-2026-107406, could lead to remote code execution or denial-of-service. The post Citrix Urges Immediate Patching of Critical NetScaler Vulnerability appeared first on SecurityWeek. This article is an excerpt from SecurityWeek View Original Source

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CISA flags new exploited NetScaler flaw as attackers crash appliances (CVE-2026-88779)

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CISA flags new exploited NetScaler flaw as attackers crash appliances (CVE-2026-88779) 2026-10-05 at 17:53 By Zeljka Zorz CISA has added another Citrix NetScaler vulnerability to its Known Exploited Vulnerabilities catalog on Sunday: CVE-2026-88779, a memory overflow bug that may cripple vulnerable NetScaler ADCs and Gateways. “Citrix has observed targeted attacks on unmitigated NetScaler deployments which […]

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Exploitation of Citrix NetScaler Zero-Day Hits Appliances Patched Days Earlier

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Exploitation of Citrix NetScaler Zero-Day Hits Appliances Patched Days Earlier 2026-10-05 at 08:14 By Eduard Kovacs Citrix has confirmed that a new zero-day vulnerability, CVE-2026-88779, emerged just days after two other exploited flaws were patched. The post Exploitation of Citrix NetScaler Zero-Day Hits Appliances Patched Days Earlier appeared first on SecurityWeek. This article is an […]

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Government, Finance Orgs Targeted in Weeks-Long NetScaler Zero-Day Attacks

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Government, Finance Orgs Targeted in Weeks-Long NetScaler Zero-Day Attacks 2026-09-30 at 15:48 By Eduard Kovacs Several security firms have confirmed seeing exploitation of the NetScaler vulnerabilities CVE-2026-88771 and CVE-2026-88772. The post Government, Finance Orgs Targeted in Weeks-Long NetScaler Zero-Day Attacks appeared first on SecurityWeek. This article is an excerpt from SecurityWeek View Original Source

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Suspected state-sponsored hackers exploited NetScaler zero-day since early September (CVE-2026-88772)

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Suspected state-sponsored hackers exploited NetScaler zero-day since early September (CVE-2026-88772) 2026-09-30 at 15:33 By Zeljka Zorz “Advanced and suspected state-sponsored threat actors” are likely to be behind the initial targeted intrusions that leveraged CVE-2026-88772, one of the two recently disclosed NetScaler vulnerabilities that have been exploited as zero-days, says Mandiant CTO Charles Carmakal. Mandiant and […]

Suspected state-sponsored hackers exploited NetScaler zero-day since early September (CVE-2026-88772) Read More »

NetScaler zero-day exploitation escalates into mass attacks (CVE-2026-88771)

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NetScaler zero-day exploitation escalates into mass attacks (CVE-2026-88771) 2026-09-29 at 17:59 By Zeljka Zorz The hacking of internet-exposed, vulnerable Citrix NetScaler ADC and Gateway deployments has escalated. What started as stealthy targeting via zero-day exploits has now become widespread “spray and pray” exploitation, fueled by the publication of a root-cause analysis and a proof-of-concept exploit […]

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Citrix NetScaler RCE zero-days exploited globally for weeks (CVE-2026-88771, CVE-2026-88772)

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Citrix NetScaler RCE zero-days exploited globally for weeks (CVE-2026-88771, CVE-2026-88772) 2026-09-28 at 12:51 By Zeljka Zorz Citrix has patched eight critical and high-severity vulnerabilities in NetScaler ADC and NetScaler Gateway, two of which (CVE-2026-88771, CVE-2026-88772) have been exploited in zero-day attacks to plant webshells on compromised devices. Rumors about their existence and active exploitation popped […]

Citrix NetScaler RCE zero-days exploited globally for weeks (CVE-2026-88771, CVE-2026-88772) Read More »

Citrix Confirms 2 NetScaler Zero-Days After Admins Pulled the Plug

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Citrix Confirms 2 NetScaler Zero-Days After Admins Pulled the Plug 2026-09-28 at 10:29 By Eduard Kovacs Citrix has released patches for the critical NetScaler vulnerabilities tracked as CVE-2026-88771 and CVE-2026-88772. The post Citrix Confirms 2 NetScaler Zero-Days After Admins Pulled the Plug appeared first on SecurityWeek. This article is an excerpt from SecurityWeek View Original […]

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Critical NetScaler Vulnerability Exploited in Attacks

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Critical NetScaler Vulnerability Exploited in Attacks 2026-09-10 at 15:20 By Ionut Arghire Tracked as CVE-2026-19490, the authentication bypass flaw has been exploited in the wild since at least September 3. The post Critical NetScaler Vulnerability Exploited in Attacks appeared first on SecurityWeek. This article is an excerpt from SecurityWeek View Original Source

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Previously patched Citrix NetScaler flaw exploited in the wild (CVE-2026-8452)

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Previously patched Citrix NetScaler flaw exploited in the wild (CVE-2026-8452) 2026-08-27 at 12:58 By Sinisa Markovic CISA added six new vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog, including a previously patched Citrix NetScaler ADC and Gateway flaw, tracked as CVE-2026-8452, that is being exploited in the wild. The agency published the alert on August […]

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Citrix urges customers to fix critical NetScaler authentication bypass (CVE-2026-19490)

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Citrix urges customers to fix critical NetScaler authentication bypass (CVE-2026-19490) 2026-08-21 at 10:55 By Sinisa Markovic Citrix has patched two vulnerabilities in NetScaler ADC and NetScaler Gateway, including a critical authentication bypass flaw tracked as CVE-2026-19490, and is urging customers to upgrade affected appliances as soon as possible. “We strongly recommend that customers review the […]

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Exploitation of Fresh Citrix NetScaler Vulnerability Begins

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Exploitation of Fresh Citrix NetScaler Vulnerability Begins 2026-03-30 at 12:32 By Ionut Arghire The critical-severity flaw leaks application memory and can be exploited to obtain authenticated administrative session IDs. The post Exploitation of Fresh Citrix NetScaler Vulnerability Begins appeared first on SecurityWeek. This article is an excerpt from SecurityWeek View Original Source

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Critical NetScaler ADC, Gateway flaw may soon be exploited (CVE-2026-3055)

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Critical NetScaler ADC, Gateway flaw may soon be exploited (CVE-2026-3055) 2026-03-24 at 16:13 By Zeljka Zorz Citrix has fixed two vulnerabilities in NetScaler ADC and NetScaler Gateway, with the more serious flaw (CVE-2026-3055) potentially allowing attackers to extract active session tokens from the memory of affected devices. Anil Shetty, senior VP of Engineering with Cloud […]

Critical NetScaler ADC, Gateway flaw may soon be exploited (CVE-2026-3055) Read More »

NetScaler ADC/Gateway zero-day exploited by attackers (CVE-2025-7775)

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NetScaler ADC/Gateway zero-day exploited by attackers (CVE-2025-7775) 2025-08-26 at 16:35 By Zeljka Zorz Three new vulnerabilities affecting (Citrix) NetScaler application delivery controller (ADC) and Gateway devices have been made public, one of which (CVE-2025-7775) has been targeted in zero-day attacks. “Exploits of CVE-2025-7775 on unmitigated appliances have been observed,” Citrix has confirmed, and released security […]

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Netscaler vulnerability was exploited as zero-day for nearly two months (CVE-2025-6543)

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Netscaler vulnerability was exploited as zero-day for nearly two months (CVE-2025-6543) 2025-08-12 at 17:51 By Zeljka Zorz FortiGuard Labs has reported a dramatic spike in exploitation attempts targeting Citrix Bleed 2, a critical buffer over‑read flaw (CVE‑2025‑5777) affecting Citrix NetScaler ADC (Application Delivery Controller) and Gateway devices. Since July 28, 2025, they have detected over 6,000 exploitation […]

Netscaler vulnerability was exploited as zero-day for nearly two months (CVE-2025-6543) Read More »

Check for CitrixBleed 2 exploitation even if you patched quickly! (CVE-2025-5777)

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Check for CitrixBleed 2 exploitation even if you patched quickly! (CVE-2025-5777) 2025-07-08 at 18:32 By Zeljka Zorz With PoC exploits for CVE-2025-5777 (aka CitrixBleed 2) now public and reports of active exploitation of the flaw since mid-June, you should check whether your Citrix NetScaler ADC and/or Gateway instances have been probed and compromised by attackers. […]

Check for CitrixBleed 2 exploitation even if you patched quickly! (CVE-2025-5777) Read More »

CitrixBleed 2 might be actively exploited (CVE-2025-5777)

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CitrixBleed 2 might be actively exploited (CVE-2025-5777) 2025-06-30 at 15:47 By Zeljka Zorz 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 have evidence of exploitation for CVE-2025-5349 or CVE-2025-5777, both of which have been patched earlier this month. CVE-2025-5777, in […]

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Evidence Suggests Exploitation of CitrixBleed 2 Vulnerability

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Evidence Suggests Exploitation of CitrixBleed 2 Vulnerability 2025-06-27 at 12:13 By Eduard Kovacs The Citrix NetScaler vulnerability tracked as CitrixBleed 2 and CVE-2025–5777 may be exploited in the wild for initial access. The post Evidence Suggests Exploitation of CitrixBleed 2 Vulnerability appeared first on SecurityWeek. This article is an excerpt from SecurityWeek View Original Source

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Critical Citrix NetScaler Flaw Exploited as Zero-Day

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Critical Citrix NetScaler Flaw Exploited as Zero-Day 2025-06-26 at 10:17 By Ionut Arghire Citrix has released patches for a critical vulnerability in NetScaler ADC and NetScaler Gateway exploited as a zero-day. The post Critical Citrix NetScaler Flaw Exploited as Zero-Day appeared first on SecurityWeek. This article is an excerpt from SecurityWeek View Original Source

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Critical Citrix NetScaler bug fixed, upgrade ASAP! (CVE-2025-5777)

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Critical Citrix NetScaler bug fixed, upgrade ASAP! (CVE-2025-5777) 2025-06-23 at 14:14 By Zeljka Zorz Citrix has fixed a critical vulnerability (CVE-2025-5777) in NetScaler ADC and NetScaler Gateway reminiscent of the infamous and widely exploited CitrixBleed flaw. The vulnerabilities have been privately disclosed and there is no indication that they are under active exploitation. Nevertheless, the […]

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