Overview
CVE-2026-3055 has been added to the CISA Known Exploited Vulnerabilities catalog. Published on March 23, 2026. Threat actors are actively exploiting this vulnerability in real-world attacks.
Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread.
Threat Intelligence
| Metric | Value |
|---|---|
| CVE ID | CVE-2026-3055 |
| Severity | HIGH |
| CVSS Score | 0.0/10 |
| CISA KEV | ✅ Yes — Actively Exploited |
| KEV Date Added | March 30, 2026 |
| Remediation Deadline | April 02, 2026 |
| EPSS Score | 4.0% exploit probability |
| EPSS Percentile | Top 99% of all CVEs |
Why This Matters
This vulnerability has been added to the CISA Known Exploited Vulnerabilities (KEV) catalog, which means threat actors are actively exploiting it in real-world attacks.
Federal agencies are required to remediate by April 02, 2026. All organizations should treat this deadline as a strong recommendation.
Recommended Actions
- Verify exposure — Determine if your environment uses the affected software.
- Apply patches — Update to the latest version as soon as a fix is available.
- Monitor for compromise — Check logs for unusual activity.
- Meet the deadline — CISA recommends remediation by April 02, 2026.
References
CVE data aggregated from the National Vulnerability Database (NVD), CISA Known Exploited Vulnerabilities catalog, and FIRST EPSS. Analysis updated as new intelligence becomes available. Last updated: 2026-03-31.