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CVE-2026-3055

Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread

Scores

9.3
CVSS 9.3 out of 10, critical severity.
4%
EPSS 4% chance of exploitation in the next 30 days.

The facts

Published
23 March 2026
Last changed
17 June 2026
NVD status
Analyzed
Severity
Critical, CVSS 9.3 out of 10 (version 4.0)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R…
Weakness
Affects
  • citrix netscaler application delivery controller
  • citrix netscaler gateway
Known exploited
Yes. CISA added it to the Known Exploited Vulnerabilities catalogue on 30 March 2026.
EPSS
4.0% chance of exploitation activity in the next 30 days (percentile 90).

Is there a Securelyn advisory?

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References