Actively exploited
Listed in CISA’s Known Exploited Vulnerabilities catalog since March 30, 2026.
CVE-2026-3055
Citrix NetScaler Out-of-Bounds Read Vulnerability
Added to KEV March 30, 2026
Alert details
- Source feed
- CISA KEV
- CVE ID
- CVE-2026-3055
- CWE
- CWE-125
- Affected products
- NetScaler · Citrix NetScaler · Citrix
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.
What it means for your business
Citrix NetScaler is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2026-3055). 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. CISA remediation due date: 2026-04-02. If you need help checking exposure, call (864) 335-9223.
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.
CISA due date: April 2, 2026
Sources
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