CVE-2026-88772 Citrix NetScaler Improper Restriction of Operations within the Bounds of a Memory Buffer
A memory overflow in Citrix NetScaler allows attackers to execute arbitrary code or cause denial of service.
- Exploited in the wild
- Since 27 Sep 2026
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-88772?
CVE-2026-88772 is a critical memory corruption vulnerability in Citrix NetScaler ADC, published on 27 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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
Weakness: CWE-119
Which versions are affected by CVE-2026-88772?
It affects 2 products.
Products include Citrix NetScaler ADC, Citrix Netscaler Gateway.
How do I fix CVE-2026-88772?
No fix has been published for CVE-2026-88772 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 30 Sep 2026.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-88772 being exploited?
Yes. Attackers have exploited CVE-2026-88772 in the wild since at least 27 Sep 2026.
Public exploit code: 1 Metasploit module and 4 proofs of concept on GitHub.
Other vulnerabilities in Citrix NetScaler ADC
- CVE-2023-3519 Citrix NetScaler ADC and NetScaler Gateway Code Injection
- CVE-2026-88771 Citrix NetScaler Improper Input Validation
- CVE-2023-4966 Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow
- CVE-2026-19490 Citrix NetScaler Authentication Bypass Using an Alternate Path or Channel
- CVE-2026-3055 Citrix NetScaler Out-of-Bounds Read
Sources
Also known as GHSA-h5xm-pf48-4c32.