Vulnerability · CVE-2025-54391
A vulnerability in the EnableTwoFactorAuthRequest SOAP endpoint of Zimbra Collaboration (ZCS) allows an attacker with valid user credentials to bypass Two-Factor Authentication (2F
Published Sep 16, 2025 · catalog updated Sep 17, 2025 · A vulnerability in the
Last checked Oct 25, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2025-54391. EPSS is 0.64%. Act only if a listed version of A vulnerability in the is installed.
Gaps on this record
- The stored product name is a package slug. The name on this page is taken from the title (A vulnerability in the).
- No version range is stored. A customer cannot check an installed version against this record.
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
Same product and reporting
- CVE-2026-107079 · Unknown
- CVE-2026-95168 · High
- CVE-2025-60475 · Unknown
- CVE-2025-60494 · Unknown
- CVE-2025-60496 · Unknown
- Severity
- Critical9.1
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.64%
- Remediation
- Advisory link
- Affected products
- vendor n/a n/a n/a
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.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor n/a n/a n/an/a
How to fix CVE-2025-54391
No stored fix
No vendor fix text is stored. Use the linked advisory before you change production.
Version check
No version range is stored, so an installed version cannot be checked on this page.
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2025-54391. EPSS is 0.64%. Act only if a listed version of A vulnerability in the is installed.
Which versions are affected?
Compare what you have installed with n/a n/a n/a n/a. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 0.64%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Sep 16, 2025 · EUVD
Detected
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 2F
Sep 17, 2025 · EUVD
Updated
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 2F
Sources
- CVE.orgVulnerability recordCVE-2025-54391
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2025-54391
30-day exploitation probability 0.64%
first.org - EUVDVulnerability recordEUVD-2025-29653
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 authenticat
euvd.enisa.europa.eu
References
Freshness
Last verified in this catalog Oct 25, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- FIRST EPSSOct 25, 2026
- CVE.orgOct 23, 2026
- EUVDOct 23, 2026