CVE-2026-3055 · netVigilance record NV26-0071
Citrix NetScaler Out-of-Bounds Read
past due
What to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA deadline 2026-04-02 · passed 5 months ago · applies to US federal civilian agencies; used elsewhere as a reference SLA
What happened
Citrix NetScaler ADC (formerly Citrix ADC), NetScaler Gateway (formerly Citrix Gateway) and NetScaler ADC FIPS and NDcPP contain an out-of-bounds reads vulnerability when configured as a SAML IDP leading to memory overread.
Who is affected
Citrix NetScaler. Affected version ranges are listed in the vendor advisory and the NVD entry linked under Sources.
Weakness class: CWE-125.
Timeline
- Added to CISA KEVExploitation in the wild confirmed by CISA
- CISA remediation deadlinepassed 5 months ago
Sources
- NVD entry for CVE-2026-3055 nvd.nist.gov/vuln/detail/CVE-2026-3055
- CISA Known Exploited Vulnerabilities catalog www.cisa.gov/known-exploited-vulnerabilities-catalog
- support.citrix.com support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696300&articleURL=NetScaler_ADC_and_NetScaler_Gateway_Security_Bulletin_for_CVE_2026_3055_and_CVE_2026_4368
- nvd.nist.gov nvd.nist.gov/vuln/detail/CVE-2026-3055