Remote Code Execution in NetScaler ADC/Gateway <14.173.41, <13.164.28
CVE-2026-88779 Published on October 4, 2026
Memory overflow vulnerability leading to Denial of Service
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.
Known Exploited Vulnerability
This Citrix NetScaler Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerabili vulnerability is part of CISA's list of Known Exploited Vulnerabilities. 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.
The following remediation steps are recommended / required by October 7, 2026: 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 applicab
Vulnerability Analysis
CVE-2026-88779 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. This vulnerability is known to be actively exploited by threat actors in an automatable fashion. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is a Buffer Overflow Vulnerability?
The software performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer.
CVE-2026-88779 has been classified to as a Buffer Overflow vulnerability or weakness.
Affected Versions
NetScaler ADC:- Before 14.1-73.41 is affected.
- Before 13.1-64.28 is affected.
- Before 14.1-73.41 FIPS is affected.
- Before 13.1-37.282 is affected.
- Before 14.1-73.41 is affected.
- Before 13.1-64.28 is affected.