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- 1Critical Zero-Day Vulnerabilities in Citrix NetScaler Under Active Exploitation●(tenable.com) Critical Zero-Day Vulnerabilities in Citrix NetScaler Under Active Exploitation: FAQ and Analysis In brief
Security firm Tenable has published an FAQ and analysis on two reported zero-day vulnerabilities in Citrix NetScaler appliances that are allegedly being actively exploited in the wild. NetScaler devices are widely used by enterprises for application delivery and remote access, making these flaws a serious concern. Security teams are being urged to review the guidance, check whether their appliances are affected, and apply mitigations or patches as they become available.
- 2Citrix confirms two actively exploited NetScaler zero-day flaws●Two Citrix NetScaler zero-day RCE flaws are under active exploitation. Citrix confirmed CVE-2026-88771 and CVE-2026-8877
Citrix has confirmed two zero-day remote code execution vulnerabilities in its NetScaler application delivery products, tracked as CVE-2026-88771 and CVE-2026-88772, both under active exploitation. The company has released patches, and security researchers are urging administrators to update internet-facing NetScaler and VPN appliances immediately, warning that unpatched systems could allow attackers to run code remotely.
- 3Citrix NetScaler zero-days under active exploitation●Two Citrix NetScaler zero-day flaws enabling remote code execution are reportedly under active exploitation. No CVE or p
Two zero-day vulnerabilities in Citrix NetScaler appliances, both allowing remote code execution, are reportedly being actively exploited by attackers. No CVE identifiers or official patches have been released yet. Administrators running NetScaler as VPN or application delivery controllers are urged to apply interim mitigation steps and watch for an official Citrix advisory.
- 4Two Unpatched NetScaler Flaws Under Active Exploitation, Researchers Warn▼Third NetScaler emergency since June. watchTowr says two unpatched remote code execution flaws in NetScaler ADC and Gate
Security firm watchTowr reports two unpatched remote code execution vulnerabilities in Citrix NetScaler ADC and Gateway that are being actively exploited. The flaws surfaced during forensic work, marking the third NetScaler emergency since June. Citrix has issued no bulletin, CVEs, or fix yet, with patches expected early next week. Some administrators are already applying workarounds rather than waiting.
- 5Citrix patches two actively exploited NetScaler zero-days●🚨 CVE-2026-88771 & CVE-2026-88772: Citrix has patched two exploited NetScaler zero-days (CVSS 9.5). Update to 14.1-73.37
Citrix has released fixes for two NetScaler vulnerabilities, CVE-2026-88771 and CVE-2026-88772, both rated critical at CVSS 9.5 and both reportedly already exploited in the wild. Administrators are urged to update to NetScaler 14.1-73.37 or 13.1-64.23 and to check their systems for signs of compromise. Security teams worldwide are discussing the patch as urgent.
- 6Citrix NetScaler Users Urged to Take Appliances Offline Amid Zero-Day Attacks▼Citrix NetScaler Appliance Users Get Shutdown Orders Over Unpatched Zero-Day Exploits Citrix NetScaler ADC and Gateway a
Citrix NetScaler ADC and Gateway appliances are under active attack through two unpatched remote code execution vulnerabilities. The Dutch cybersecurity agency NCSC and security firm watchTowr have advised organisations to take affected appliances offline, as no patches are yet available. Security teams worldwide are scrambling to assess exposure and mitigate the risk of compromise.
- 7Citrix issues security bulletin for eight NetScaler vulnerabilities●Citrix has finally spoken. Citrix NetScaler ADC and Citrix NetScaler Gateway Security Bulletin for CVE-2026-88771, CVE-2
Citrix has released a long-awaited security bulletin for its NetScaler ADC and NetScaler Gateway products, covering eight vulnerabilities tracked as CVE-2026-88771 through CVE-2026-88778. Administrators of the widely used application delivery and remote access products are being urged to review the advisory and apply the relevant patches, as NetScaler flaws have historically been heavily exploited.