CVE-2026-3055 Citrix NetScaler Out-of-Bounds Read
Attackers can read sensitive memory contents from NetScaler devices configured as SAML IDPs due to insufficient input validation.
- Exploited in the wild
- Since 30 Mar 2026
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-3055?
CVE-2026-3055 is a critical vulnerability in NetScaler ADC, published on 23 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread
Weakness: CWE-125
Which versions are affected by CVE-2026-3055?
It affects 2 products.
Products include Citrix NetScaler ADC, Citrix Netscaler Gateway.
How do I fix CVE-2026-3055?
No fix has been published for CVE-2026-3055 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 2 Apr 2026.
Is CVE-2026-3055 being exploited?
Yes. Attackers have exploited CVE-2026-3055 in the wild since at least 30 Mar 2026.
Public exploit code: 1 Metasploit module, 1 Nuclei template and 5 proofs of concept on GitHub.
Other vulnerabilities in NetScaler ADC
- CVE-2023-3519 Citrix NetScaler ADC and NetScaler Gateway Code Injection
- CVE-2026-88771 Citrix NetScaler Improper Input Validation
- CVE-2026-88772 Citrix NetScaler Improper Restriction of Operations within the Bounds of a Memory Buffer
- CVE-2023-4966 Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow
- CVE-2026-19490 Citrix NetScaler Authentication Bypass Using an Alternate Path or Channel
Sources
Also known as GHSA-wv7p-q4p2-p6pf.