March 30, 2026 · Applied Cybernetics Group
CVE-2026-3055 — Citrix NetScaler
Citrix NetScaler Out-of-Bounds Read Vulnerability
- Added to KEV
2026-03-30- Federal due date
2026-04-02- Vendor
- Citrix
- Product
- NetScaler
- EPSS
- 99.7th percentile (score 0.840, as of
2026-07-13) - NVD CVSS v3.1
- 9.8 (CRITICAL)
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2026-3055
CISA short description
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.
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.
NVD description
Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread