CVE-2026-3055

Insufficient input validation leading to memory overread

State: Published
Severity: 9.3 Critical
Published: Mar 23, 2026
Updated: Mar 31, 2026
Reserved: Feb 23, 2026

Description

Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread

Scores

CVSS	Score	Vector	Source
4.0	9.3 Critical	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L	NetScaler

Weaknesses

CWE-125 Out-of-bounds Read

Affected Products

Product	Versions
ADCNetScaler	14.1 to before 66.59Affected 13.1 to before 62.23Affected 13.1 FIPS and NDcPP to before 37.262Affected
GatewayNetScaler	14.1 to before 66.59Affected 13.1 to before 62.23Affected

References

https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696300
https://labs.watchtowr.com/please-we-beg-just-one-weekend-free-of-appliances-citrix-netscaler-cve-2026-3055-memory-overread-part-2/third-party-advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-3055government-resource

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