# CERT-FR flags Veeam Backup for Microsoft 365 flaws

Published: 2026-10-29 · Severity: routine
Canonical: https://vorant.io/reports/d20532a0-36f3-5945-8236-d8e4d94b93f1/cert-fr-flags-veeam-backup-for-microsoft-365-flaws
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> CERT-FR warns of multiple vulnerabilities in Veeam Backup for Microsoft 365 enabling remote code execution, privilege escalation and data exposure.

Source: cert.cyber.gouv.fr — https://www.cert.cyber.gouv.fr/avis/CERTFR-2026-AVI-1411

## What to check

- Applies to: The 4 CVEs named below. Whether you run an affected version is not assessed: check the versions the source lists.
- Exploitation: No exploitation in the wild and no public exploit is recorded for the CVEs named.

CERT-FR issued an advisory covering multiple vulnerabilities in Veeam Backup for Microsoft 365, affecting version 8.x builds prior to 8.6.0.1102 and versions between 8.6.0.1102 and 8.6.0.5011. The flaws, tracked as CVE-2025-64394, CVE-2026-106076, CVE-2026-106077 and CVE-2026-106078, can allow an attacker to achieve remote code execution, privilege escalation, SQL injection, denial of service, security policy bypass and confidentiality breaches of backup data.

No in-the-wild exploitation is indicated in the advisory. Veeam published fixes via security bulletin kb4962 (28 October 2026). CERT-FR recommends organizations apply Veeam's patches promptly given the sensitivity of backup infrastructure, which if compromised could expose or disrupt enterprise backup data across Microsoft 365 environments.

Defenders running affected Veeam Backup for Microsoft 365 versions should prioritize patching to the fixed build (8.6.0.5011 or later) and review Veeam's bulletin for detailed per-CVE guidance, as backup systems are high-value targets for ransomware and data-theft operations.

## Mentioned in this report

- Vulnerabilities: CVE-2025-64394, CVE-2026-106076, CVE-2026-106077, CVE-2026-106078

Source reporting: https://www.cert.cyber.gouv.fr/avis/CERTFR-2026-AVI-1411

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