# CVE-2025-54982: SAML 2.0 Public Key Validation Issue

> CVE-2025-54982: SAML 2.0 Public Key Validation Issue. CVSS 9.6 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2025-54982
Last updated: 2026-06-17T09:41:03Z

- Published: 2025-08-05 05:36 UTC · Updated: 2026-06-17 09:41 UTC · Assigner: Zscaler
- CVSS: 9.6 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
- EPSS: 0.40%, 34th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-347

## Description

An improper verification of cryptographic signature in Zscaler's SAML authentication mechanism on the server-side allowed an authentication abuse.

## Affected vendors and products

- Zscaler: Authentication Server

## Tracked companies

- [Zscaler](https://rewindex.com/company/zscaler.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-54982)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-54982)
- [https://help.zscaler.com/zia/about-identity-providers](https://help.zscaler.com/zia/about-identity-providers)

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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-2025-54982 · Markdown: https://rewindex.com/cve/CVE-2025-54982.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-54982 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:50:32.553Z