---
title: "CVE-2026-106077: Veeam Backup for Microsoft 365 - Broken Access Control"
description: "Veeam Backup for Microsoft 365 contains a file system read vulnerability caused by improper access control, letting users with Administrator role read arbitrary files on the backup server with LocalSystem privileges, exploit requires Administrator role."
url: https://panop.io/threat-heartbeat/CVE-2026-106077/
---

# CVE-2026-106077 Veeam Backup for Microsoft 365 - Broken Access Control

Veeam Backup for Microsoft 365 contains a file system read vulnerability caused by improper access control, letting users with Administrator role read arbitrary files on the backup server with LocalSystem privileges, exploit requires Administrator role.

CVSS base score 8.3 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.23% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-106077)

## Details

Type

Broken Access Control

Impact

File System Read, Information Disclosure

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Published

27 October 2026

Updated

29 October 2026

Weakness

[CWE-863](https://cwe.mitre.org/data/definitions/863.html)

## Vendor fix

Update to the latest version of Veeam Backup for Microsoft 365.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-106077](https://nvd.nist.gov/vuln/detail/CVE-2026-106077)
- [https://www.veeam.com/kb4957](https://www.veeam.com/kb4957)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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