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TI-2025-34199 Aliases CVE-2025-54391GHSA-34c6-vxrp-m855

A vulnerability in the EnableTwoFactorAuthRequest SOAP endpoint of Zimbra Collaboration…

Priority MEDIUM 48CWE-284Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-284.

Summary

A vulnerability in the EnableTwoFactorAuthRequest SOAP endpoint of Zimbra Collaboration (ZCS) allows an attacker with valid user credentials to bypass Two-Factor Authentication (2FA) protection. The attacker can configure an additional 2FA method (either a third-party authenticator app or email-based 2FA) without presenting a valid authentication token or proving access to an already configured 2FA method. This bypasses 2FA and results in unauthorized access to accounts that are otherwise protected by 2FA.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00639 50th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
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
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-54391
  2. 2026-10-03 Alias added: GHSA-34c6-vxrp-m855
  3. 2026-10-25 EPSS moved to the 50th–90th percentile

References

Other 3

Sources

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