---
id: "CVE-2026-107671"
kind: "vulnerability"
aliases: ["CVE-2026-107671"]
title: "Administrator MFA bypass by disabling MFA globally before verification"
severity: "high"
cvss: 8.5
epss: null
exploited: false
status: "open"
category: "other"
products: [{"name": "Veeam ONE", "fixed": ["13.1.0.7940 (13.1 P1)"], "affected": ">= 13.1, <= 13.1.0.7233", "ecosystem": "vendor"}]
ecosystems: []
tags: ["mfa", "other", "self-hosted", "veeam", "veeam-one"]
not_affected_if: ["veeam-one-12", "veeam-one-13.0"]
published_at: "2026-10-27T17:16:56+00:00"
first_seen_at: "2026-10-27T17:32:45+00:00"
updated_at: "2026-10-27T17:39:23+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-107671", "first_seen_at": "2026-10-27T17:32:45+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-10-27T17:39:23+00:00"}]
---

# Administrator MFA bypass by disabling MFA globally before verification

Veeam ONE 13.1: an attacker with valid Administrator credentials can disable MFA globally before completing MFA verification, so the second factor no longer protects admin logins.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Veeam ONE affected >= 13.1, <= 13.1.0.7233 fixed 13.1.0.7940 (13.1 P1)

## How to check

In the Veeam ONE client, check Help > About for the build number. Builds 13.1.0.7233 or earlier in the 13.1 line are vulnerable. 13.1.0.7940 (13.1 P1) or later is fixed. 13.0.x and 12.x are not affected.

## Fix

Install Veeam ONE 13.1 P1 (build 13.1.0.7940) per KB4951.

## Timeline

- 2026-10-27T17:32:45+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-107671
- 2026-10-27T17:39:23+00:00 analyst — Identified as Veeam ONE via vendor KB4951 (published today); affected 13.1.0.7233 and earlier 13.1 builds, fixed in 13.1 P1 build 13.1.0.7940. No exploitation or PoC found; community search not run (new, vendor-only).

## Documents

- [advisory] KB4951: Vulnerabilities Resolved in Veeam ONE 13.1 Patch 1 https://www.veeam.com/kb4951

## From the sources

A vulnerability allowing an attacker with valid Administrator credentials to bypass multi-factor authentication by disabling it globally before completing MFA verification.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_