CVE-2026-3055: Insufficient input validation leading to memory overread
Critical · CVSS 9.8 (CVSS 3.1)KEV known exploitedEPSS 91.5%, 100th percentilePublished Updated Assigner: NetScaler
In CISA’s Known Exploited Vulnerabilities catalog: Citrix NetScaler Out-of-Bounds Read Vulnerability.
Added , federal remediation due . Known ransomware use: Unknown.
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Description
Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · CWE-125
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
NetScaler: ADCNetScaler: Gateway
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- support.citrix.com/support-home/kbsearch/article (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)