Citrix NetScaler Bug May Be Multiple Flaws in One

Critical Citrix NetScaler memory flaw actively exploited in attacks

Hackers are exploiting a critical severity vulnerability, tracked as CVE-2026-3055, in Citrix  NetScaler ADC and NetScaler Gateway appliances to obtain sensitive data.

Citrix NetScaler bug may be multiple flaws in one

: Researchers say attackers are already looting vulnerable boxes

CVE-2026-3055 Citrix NetScaler Memory Overread

CVE-2026-3055 is a critical out-of-bounds read vulnerability affecting customer-managed NetScaler ADC and NetScaler Gateway appliances when configured as a SAML Identity Provider. Citrix assigns a CVSS v4.0 score of 9.3 and attributes the issue to insufficient input validation. An unauthenticated remote attacker can exploit this flaw to read sensitive data from appliance memory. Source

CISA Adds One Known Exploited Vulnerability to Catalog

CISA Adds One Known Exploited Vulnerability to Catalog ggaylor Mar 30, 2026 Release DateMarch 30, 2026 DescriptionCISA has added one new vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation.CVE-2026-3055 Citrix NetScaler Out-of-Bounds Read VulnerabilityThis type of vulnerability is a frequent attack vector for malicious cyber actors and poses significant risks to the federal enterprise.Bi…

AL26-006 - Vulnerability impacting Citrix NetScaler ADC and NetScaler Gateway - CVE-2026-3055

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CVE-2026-3055 Threatens Citrix NetScaler SAML IDP

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 Prov…