CVE-2026-3055 — Citrix NetScaler Out-of-Bounds Read Vulnerability
Overview
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.
Vulnerability details
- CVE ID
- CVE-2026-3055
- Vulnerability
- Citrix NetScaler Out-of-Bounds Read Vulnerability
- Vendor
- Citrix
- Affected products
- Citrix: NetScaler
- Severity
- HIGH
- Exploitation status
- Actively exploited in the wild (CISA KEV)
- EPSS score
- 84.0% probability of exploitation in 30 days · 100th percentile
- Published
- 2026-03-30
Remediation guidance
CVE-2026-3055 is in CISA's Known Exploited Vulnerabilities (KEV) catalog — U.S. federal civilian agencies are required to remediate it under Binding Operational Directive 22-01. Treat it as a priority for every environment.
Apply the vendor's official security update for Citrix the affected product as soon as possible. Where a patch is unavailable, apply vendor mitigations or isolate/segment exposed systems.
FIRST EPSS estimates a 84.0% probability that CVE-2026-3055 will be exploited within the next 30 days (100th percentile of all CVEs) — useful for risk-based patch sequencing.
Hunt for indicators of compromise tied to this vulnerability and confirm logging/EDR coverage on affected assets.
Authoritative references
Remediate CVE-2026-3055 — and stay ahead of the next one
CVE-2026-3055 is listed in the CISA KEV catalog as actively exploited — treat remediation as urgent. Scan your domain free to see whether CVE-2026-3055 and other Citrix issues affect you and get a prioritized remediation report (full report from ₹999) — or stream the full feed of 1,600+ actively-exploited CVEs straight into your SOC.
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