CVE-2026-21669
Authenticated Remote Code Execution Vulnerability in Backup Server
Publication date: 2026-03-12
Last updated on: 2026-03-31
Assigner: HackerOne
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| veeam | veeam_backup_&_replication | From 13.0.0.496 (inc) to 13.0.1.2067 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-94 | The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
CVE-2026-21669 is a critical security vulnerability found in Veeam Backup & Replication software versions 13.0.1.1071 and earlier 13.x builds. It allows an authenticated domain user to execute remote code on the Windows-based Backup Server, which means that someone with valid domain credentials can run arbitrary code remotely on the backup server.
This vulnerability has a very high severity score of 9.9 out of 10 according to the CVSS v3.1 rating, indicating it poses a severe security risk.
The issue was discovered during internal testing by Veeam and has been fixed in version 13.0.1.2067.
How can this vulnerability impact me? :
This vulnerability can have serious impacts because it allows an authenticated domain user to perform remote code execution on the backup server.
- An attacker with valid domain credentials could run arbitrary code remotely, potentially taking full control of the backup server.
- This could lead to unauthorized access, data theft, data corruption, or disruption of backup services.
- Since backup servers often contain critical data and system backups, compromising them could severely affect business continuity and data recovery.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
The immediate step to mitigate this vulnerability is to update Veeam Backup & Replication to version 13.0.1.2067 or later, as this version contains the fix for CVE-2026-21669.