# CVE-2026-3055: Insufficient input validation leading to memory overread

> CVE-2026-3055: Insufficient input validation leading to memory overread. CVSS 9.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2026-3055
Last updated: 2026-06-17T10:42:58Z

- Published: 2026-03-23 20:21 UTC · Updated: 2026-06-17 10:42 UTC · Assigner: NetScaler
- CVSS: 9.8 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS: 91.5%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2026-03-30, federal due date 2026-04-02, ransomware use: Unknown
- CWE: CWE-125

## Description

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

## CISA 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.

## Affected vendors and products

- NetScaler: ADC
- NetScaler: Gateway

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-3055)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-3055)
- [https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696300](https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696300)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-3055 · Markdown: https://rewindex.com/cve/CVE-2026-3055.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-3055 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:50:16.085Z