Citrix NetScaler

What it is

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.

What to do

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.

Vendor notices and references

• support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697174
• community.citrix.com/techzone-blogs/110_security-updates/understanding-and-addressing-cve-
• nvd.nist.gov/vuln/detail/CVE-2026-88779

Description and required action as published by CISA. Full record at NVD.