CVE-2026-88779
Citrix NetScaler Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability
Exploited in the wild
This vulnerability is on the CISA Known Exploited Vulnerabilities list, added 2026-10-04. Federal due date: 2026-10-07.
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Impact
Citrix NetScaler ADC (formerly Citrix ADC) and Citrix NetScaler Gateway (formerly Citrix Gateway) contain an improper restriction of operations within the bounds of a memory buffer vulnerability that could allow for a denial of service.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Citrix | Netscaler Application Delivery Controller | from 13.1 before 13.1-37.282 from 13.1 before 13.1-64.28 from 14.1 before 14.1-73.41 from 14.1-66.68 through 14.1-73.41 |
| Citrix | Netscaler Gateway | from 13.1 before 13.1-64.28 from 14.1 before 14.1-73.41 |
Weakness classification
References
- NVD record
- CVE.org record
- CISA KEV catalog
- 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