What is CVE-2026-88772?
Vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1.37.279 FIPS and NDcPP; Gateway: before 14.1-73.37 and before 13.1-64.23 leading to Remote Code Execution or Denial of Service
Timeline
- 2026-09-27Published to the U.S. National Vulnerability Database (NVD)
- 2026-09-27Added to the CISA Known Exploited Vulnerabilities (KEV) catalog
- 2026-09-28First covered in a defend.network daily briefing
- 2026-09-28NVD record last updated
- 2026-09-30CISA federal remediation deadline (BOD 26-04)
CISA Known Exploited Vulnerability
Citrix NetScaler Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability
Affected product
Citrix NetScaler
NVD also lists CPE entries for: Citrix Netscaler Application Delivery Controller, Citrix Netscaler Gateway
Remediation Steps
- Apply the vendor security update for Citrix NetScaler ADC/Gateway as a priority.
- Restrict network exposure of the affected service to trusted sources until patched.
- Review logs and detections for indicators of exploitation.
- Confirm fixed versions against the official vendor advisory before deploying.
References
- https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697096&articleTitle=Citrix_NetScaler_ADC_and_Citrix_NetScaler_Gateway_Security_Bulletin_for_CVE_2026_88771_CVE_2026_88772_CVE_2026_88773_CVE_2026_88774_CVE_2026_88775_CVE_2026_88776_CVE_2026_88777_and_CVE_2026_88778
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-88772
- https://nvd.nist.gov/vuln/detail/CVE-2026-88772
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Referenced in our briefings & reports
- Vulnerability Priority Report – Week 4 of October 2026 (October 26 – November 1)
- Vulnerability Priority Report – Week 3 of October 2026 (October 19 – 25)
- Vulnerability Priority Report – Week 2 of October 2026 (October 12 – 18)
- Vulnerability Priority Report – Week 1 of October 2026 (October 5 – 11)
- Vulnerability Priority Report – Week 4 of September 2026 (September 28 – October 4)
- Citrix NetScaler, Oracle, Cloudflare RCEs under active exploitation; WAF bypasses escalate risks (2026-09-28)
Related vulnerabilities
- CVE-2026-88779 – Citrix NetScaler (same product)
- CVE-2026-88771 – Citrix NetScaler (same product)
- CVE-2026-19490 – Citrix NetScaler (same product)
- CVE-2026-3055 – Citrix NetScaler (same product)
- CVE-2026-8452 – Citrix NetScaler ADC And NetScaler Gateway (same product)
- CVE-2026-8451 – Citrix Netscaler (same product)
Browse all tracked CVEs in the defend.network CVE database →
🤖 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.