What is CVE-2026-88779?
Vulnerability in NetScaler ADC and NetScaler Gateway. This issue affects ADC: before 14.1-73.41, before 13.1-64.28, before 14.1-73.41 FIPS, and before 13.1-37.282; Gateway: before 14.1-73.41 and before 13.1-64.28.
Timeline
- 2026-10-04Published to the U.S. National Vulnerability Database (NVD)
- 2026-10-04Added to the CISA Known Exploited Vulnerabilities (KEV) catalog
- 2026-10-05First covered in a defend.network daily briefing
- 2026-10-07CISA federal remediation deadline (BOD 22-01)
CISA Known Exploited Vulnerability
Citrix NetScaler Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability
Affected product
Citrix NetScaler
Remediation Steps
- Apply Citrix's emergency security updates for NetScaler zero-day vulnerability CVE-2026-88779
- Monitor NetScaler instances for denial-of-service attack patterns and anomalous traffic
- Restrict administrative access to NetScaler systems to authorized personnel only
- Review Citrix security advisories for version-specific patch availability and deployment guidance
References
- https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697174
- https://community.citrix.com/techzone-blogs/110_security-updates/understanding-and-addressing-cve-2026-88779-in-citrix-netscaler-adc-and-citrix-netscaler-gateway/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-88779
- https://nvd.nist.gov/vuln/detail/CVE-2026-88779
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Referenced in our briefings & reports
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🤖 This CVE page is generated by defend.network from NVD, CISA KEV, EPSS, and our verified daily briefings. Severity and exploitation data come from official sources; always verify remediation steps against the official vendor advisory before acting in production.