CVE-2026-3055
CRITICALCVSS 9.8/10Actively ExploitedEPSS 84.00%
Last modified
CVE-2026-3055 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread. CISA has confirmed active exploitation in the wild. EPSS estimates a 84.00% chance of exploitation in the next 30 days.
Description
Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread
Metrics
Exploitation Status
This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Citrix | Netscaler Application Delivery Controller | >= 13.1, < 13.1-37.262 |
| Citrix | Netscaler Application Delivery Controller | >= 13.1, < 13.1-62.23 |
| Citrix | Netscaler Application Delivery Controller | >= 14.1, < 14.1-60.58 |
| Citrix | Netscaler Gateway | >= 13.1, < 13.1-62.23 |
| Citrix | Netscaler Gateway | >= 14.1, < 14.1-60.58 |
References
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-3055US Government Resource
Timeline
- Published
- Last Modified
- Status
- Analyzed
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
How severe is CVE-2026-3055?
CVE-2026-3055 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 84.00% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.
How do I fix CVE-2026-3055?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2026-3055?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST