CVE-2025-54982

CRITICAL

Zscaler Authentication Server < 6.2r - Authentication Abuse via SAML Cryptographic Signature Verification

Title source: llm
STIX 2.1

Description

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

References (1)

Core 1

Scores

CVSS v3 9.6
EPSS 0.0037
EPSS Percentile 28.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-347
Status published
Products (1)
Zscaler/Authentication Server < 6.2r
Published Aug 05, 2025
Tracked Since Feb 18, 2026