A newly disclosed critical vulnerability, CVE-2026-3055, affecting Citrix NetScaler appliances is already drawing attention from threat actors, with evidence of active reconnaissance efforts emerging shortly after its public disclosure.

The flaw, which carries a CVSS score of 9.3, highlights a serious security concern for organizations relying on NetScaler ADC and NetScaler Gateway, particularly those configured as a SAML IDP (SAML Identity Provider).  Understanding CVE-2026-3055 and Its Impact 

The CVE-2026-3055 flaw is caused by insufficient input validation, leading to a memory overread vulnerability (classified under CWE-125: Out-of-bounds Read). This weakness can allow an unauthe...