NetScaler ADC/Gateway Memory Overflow CVE-2026-8452 (72.61)
CVE-2026-8452 Published on June 30, 2026
Memory overflow vulnerability leading to unpredictable or erroneous behavior and Denial of Service
Memory overflow vulnerability NetScaler ADC and NetScaler Gateway leading to unpredictable or erroneous behavior and Denial of Service if the appliance is configured as a Gateway (SSL VPN, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server
Known Exploited Vulnerability
This Citrix NetScaler ADC and NetScaler Gateway Improper Restriction of Operations within the Bounds of a 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 which could lead to denial of service. .
The following remediation steps are recommended / required by August 29, 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-2026-8452 is exploitable 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-2026-8452 has been classified to as a Buffer Overflow vulnerability or weakness.
Affected Versions
NetScaler ADC:- Version 14.1 and below 72.61 is affected.
- Version 13.1 and below 63.18 is affected.
- Version 14.1 FIPS and below 72.61 is affected.
- Version 13.1 FIPS and NDcPP and below 37.272 is affected.
- Version 14.1 and below 72.61 is affected.
- Version 13.1 and below 63.18 is affected.