CVE-2025-54982

CRITICALNVD 9.69.6—

9.6

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

CVSS v3: 9.6
EG Score: 9.6(medium)
EPSS: 29.5%
KEV: Not listed

Published

August 5, 2025

Last Modified

April 15, 2026

Advisory Details (1)

Auto-updated May 21, 2026

No patch confirmed yet.

generic

https://help.zscaler.com/zia/about-identity-providers

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-347Improper Verification of Cryptographic Signature

Data Freshness Timeline

(refreshed 13× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
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2026-05-29 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
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2026-05-28 13:44 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
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2026-05-26 13:44 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch

Frequently asked(5)

What is CVE-2025-54982?

CVE-2025-54982 is a critical vulnerability published on August 5, 2025. An improper verification of cryptographic signature in Zscaler's SAML authentication mechanism on the server-side allowed an authentication abuse.

When was CVE-2025-54982 disclosed?

CVE-2025-54982 was first published in the National Vulnerability Database on August 5, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-54982 actively exploited?

CVE-2025-54982 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 29.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-54982?

CVE-2025-54982 has a CVSS v3 base score of 9.6 (NVD).

How do I remediate CVE-2025-54982?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-54982, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2025-54982

📅 Published

🔄 Last Modified

📋 Advisory Details (1)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2025-54982?

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Frequently asked(5)

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