Vulnerability in Zscaler Authentication Server
CVE-2025-54982
An improper verification of cryptographic signature in Zscaler's SAML authentication mechanism on the server-side allowed an authentication abuse.
EPSS: 0.004 (30.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N.
Affected products
- Zscaler Authentication Server — versions 0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2025-54982?
- CVE-2025-54982 is a critical-severity vulnerability in Zscaler Authentication Server, classified under Improper Verification of Cryptographic Signature. CVSS score: 9.6/10. Published 2025-08-05.
- How severe is CVE-2025-54982?
- Critical severity. CVSS v3 base score is 9.6 out of 10.