CVE-2026-3055
CRITICAL CISA KEVCVSS v3
9.8
CRITICAL
EPSS Score
—
exploit probability
CISA KEV
Yes
known exploited
Exploitation
—
SSVC status
Description
Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread
CISA Known Exploited Vulnerability
- Date Added
- 3/30/2026
- Patch Due Date
- 4/2/2026
- 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.
Technical Details
- CVSS v3 Vector
- 3.1
- Published
- 3/23/2026
- Last Modified
- 3/31/2026
Frequently Asked Questions
What is CVE-2026-3055?
Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread
Is CVE-2026-3055 actively exploited?
Yes. CVE-2026-3055 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 4/2/2026.
What is the CVSS score for CVE-2026-3055?
CVE-2026-3055 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string 3.1.
Is CVE-2026-3055 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.