Citrix NetScaler ADC Remote Code Exec Vulnerability (pre-14.1-73.37)
CVE-2026-88772 Published on September 27, 2026
Memory overflow vulnerability leading to Remote Code Execution or Denial of Service
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
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 and NetScaler Gateway contain an improper restriction of operations within the bounds of a memory buffer vulnerability that could allow for remote code execution or denial of service.
The following remediation steps are recommended / required by September 30, 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-2026-88772 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is consided to have a high level of attack complexity. This vulnerability is known to be actively exploited by threat actors. 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-2026-88772 has been classified to as a Buffer Overflow vulnerability or weakness.
Affected Versions
Citrix NetScaler ADC:- Before 14.1-73.37 is affected.
- Before 13.1-64.23 is affected.
- Before 14.1-73.37 FIPS is affected.
- Before 13.1.37.279 FIPS and NDcPP is affected.
- Before 14.1-73.37 is affected.
- Before 13.1-64.23 is affected.