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TI-2025-34691 Aliases CVE-2025-54982GHSA-84x5-5f67-wjp4

SAML 2.0 Public Key Validation Issue

Priority MEDIUM 43CWE-347Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-347.

Summary

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

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00414 35th percentileScored 2026-11-07
Fix Fixed Authentication Server (Zscaler): 6.2r

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ZscalerAuthentication Serverbefore 6.2r6.2rPatch availableCNA
  • Authentication Server VendorZscaler Affected before 6.2r Fixed in 6.2r Patch available CNA

Remediation

  • Fix · CNA Authentication Server (Zscaler) Fixed in 6.2r

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-54982
  2. 2026-10-03 Alias added: GHSA-84x5-5f67-wjp4

References

Other 1

  • TI-2023-22133 Inappropriate file type control in Zscaler Proxy versions 3.6.1.25 and prior allows local… CVSS 3.1MEDIUM 5.5
  • TI-2026-42530 Remote code execution in Zscaler Client Connector CVSS 3.1CRITICAL 9.1
  • TI-2026-42526 Authentication bypass between ZCC and client connector portal CVSS 3.1CRITICAL 9.1
  • TI-2020-09334 The Zscaler Client Connector for Windows prior to 2.1.2.74 had a stack based buffer… CVSS 3.1CRITICAL 9.8
  • TI-2024-15528 Local Privilege Escalation via lack of input validation CVSS 3.1CRITICAL 9.8
  • TI-2024-15526 Insecure MacOS code sign check fallback CVSS 3.1CRITICAL 9.8
See all 58 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences