Critical Zero-Day Vulnerabilities Exploited in Citrix NetScaler ADC, Gateway
Updated under an hour ago ()
Update October 9, 2026: CISA has updated this Alert to: (1) include CVE-2026-107406; (2) include CVE-2026-88779 following its addition to the KEV Catalog on Oct. 4, 2026; (3) clarify the potential relationship between CVE-2026-88779 and CVE-2026-88771; and (4) emphasize the importance of promptly applying patches for CVE-2026-88771 through CVE-2026-88779 and CVE-2026-107406, as well as reviewing Citrix guidance for suspected or confirmed compromises involving NetScaler ADC or Gateway. Update October 2, 2026: CISA has updated this Alert to provide a SIGMA detection rule resource to help identify potentially suspicious activity. CISA is amplifying Citrix’s disclosure of ten new vulnerabilities affecting Citrix NetScaler ADC and Citrix NetScaler Gateway products: CVE-2026-88771, CVE-2026-88772, CVE-2026-88773, CVE-2026-88774, CVE-2026-88775, CVE-2026-88776, CVE-2026-88777, CVE-2026-88778, CVE-2026-88779, and CVE-2026-107406. CISA added CVE-2026-88771 and CVE-2026-88772 to its Known Exploited Vulnerabilities (KEV) Catalog on Sept. 27, 2026. Both are critical, zero-day vulnerabilities that can independently enable remote code execution. CISA received reports and partner threat intellig…
- Tags
- CISA, KEV
- Related exam domains
- CISSP 7: Security Operations; CISSP 8: Software Development Security; CISM 2: Information Security Risk Management
- Source record id
- /node/25552
- First seen by InfoSec Signals
- 10/9/2026
Source: CISA cybersecurity advisories, Cybersecurity and Infrastructure Security Agency about this source more from it
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