# CVE-2026-21671: A vulnerability allowing an authenticated user with the Backup Administrator role to perform remote code execution…

Source: https://junglewise.ai/threats/cve-2026-21671-a-vulnerability-allowing-an-authenticated-user-with-the-backup  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-03-12. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2026-21671 · Severity: critical · CVSS 9.1 · Published 2026-03-12

Veeam Backup & Replication is a data protection solution used to back up and restore virtual and physical workloads. A security vulnerability in high availability deployments allows an authorized Backup Administrator to execute arbitrary commands on the system. This could lead to a complete takeover of the backup infrastructure and potential access to sensitive backed-up data.

Technologies: [Veeam Backup \](https://junglewise.ai/threats/technologies/veeam-backup). Vendors: [Veeam](https://junglewise.ai/threats/vendors/veeam).

## Quick answers

**Is CVE-2026-21671 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-21671 being exploited in the wild.

**How severe is CVE-2026-21671?** Critical severity, with a CVSS score of 9.1, published 12 March 2026.

**Which products and versions are affected?** Veeam Veeam Backup & Replication 13.0.0.496 through 13.0.1.1071.

**Is there a fix for CVE-2026-21671?** A patch was published on 2026-03-12: Fixed in version 13.0.1.2067 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-21671 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-21671?** Check whether you run Veeam Backup \. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A remote code execution (RCE) vulnerability exists in Veeam Backup & Replication high availability (HA) deployments due to improper control of generation of code (CWE-94). The flaw is specifically present in the Veeam Software Appliance deployment type. An attacker must be authenticated with the high-privileged 'Backup Administrator' role to exploit this vulnerability. Successful exploitation allows for full system compromise with a CVSS 3.1 score of 9.1. The issue is resolved in Veeam Backup & Replication version 13.0.1.2067.

## Affected products

- Veeam Veeam Backup & Replication 13.0.0.496 through 13.0.1.1071

## Timeline

- 2026-03-12: disclosed
- 2026-03-12: advisory
- 2026-03-12: patched: Fixed in version 13.0.1.2067

## References

- [https://www.veeam.com/kb4831](https://www.veeam.com/kb4831)

## Related threats

- [Veeam Backup & Replication SQL injection RCE as postgres user](https://junglewise.ai/threats/cve-2026-21708-veeam-backup-replication-sql-injection-rce-as-postgres-user)
- [A vulnerability allowing a low-privileged user to extract saved SSH credentials.](https://junglewise.ai/threats/cve-2026-21670-a-vulnerability-allowing-a-low-privileged-user-to-extract-saved)
- [A vulnerability allowing an authenticated domain user to perform remote code execution (RCE) on the Backup Server.](https://junglewise.ai/threats/cve-2026-21669-a-vulnerability-allowing-an-authenticated-domain-user-to-perform)
- [A vulnerability allowing an authenticated domain user to bypass restrictions and manipulate arbitrary files on a Backup Repository.](https://junglewise.ai/threats/cve-2026-21668-a-vulnerability-allowing-an-authenticated-domain-user-to-bypass)
- [This vulnerability allows a Backup Operator to perform remote code execution (RCE) as the postgres user by sending a…](https://junglewise.ai/threats/cve-2025-59470-this-vulnerability-allows-a-backup-operator-to-perform-remote)