AUGUST 4, 2026
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Case File

CVE-2025-54391

CRITICAL · CVSS 9.1 EPSS 0.58%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2025-09-16 · Last synced 2026-08-04

CyberRota Analysis

This is a critical severity vulnerability with a CVSS score of 9.1. See the original NVD description below for full technical details.

CVE
CVE-2025-54391
Severity
CRITICAL
CVSS
9.1
EPSS
0.58%

Original NVD Description

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.