CVE-2025-54982 CRITICAL

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

Vendor Zscaler
Product Authentication Server
Weakness CWE-347
Published August 5, 2025
Last update February 26, 2026
View on NVD All CVEs

CVSS base score

9.6/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

What the vulnerability does

01Description

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

Key dates

02Disclosure timeline

August 5, 2025 CVE published
February 26, 2026 Record updated