Is CVE-2026-21672 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-21672 being exploited in the wild.

How severe is CVE-2026-21672?

High severity, with a CVSS score of 8.8, published 12 March 2026.

Which products and versions are affected?

Veeam Backup & Replication 12, 12.1, 12.2, 12.3, 12.3.1, 12.3.2 (prior to build 12.3.2.4465); Veeam Backup & Replication 13 (prior to build 13.0.1.2067).

Is there a fix for CVE-2026-21672?

A patch was published on 2026-03-12: Fixed in builds 12.3.2.4465 and 13.0.1.2067. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-21672 attacked?

It is attacked with local access, in a network appliance.

Am I affected by CVE-2026-21672?

Check whether anything you run is named in the advisory. 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.

CVE-2026-21672: A vulnerability allowing local privilege escalation on Windows-based Veeam Backup & Replication servers.

CVE-2026-21672 · Severity: high · CVSS 8.8 · Published 2026-03-12

A vulnerability in Veeam Backup & Replication allows a user with low-level access to a Windows server to gain full administrative control. Veeam is a critical data protection and backup solution used to safeguard corporate data; an attacker who gains administrative rights could potentially access, modify, or delete sensitive backups. This could lead to significant data loss or provide a foothold for further attacks within the corporate network.

Quick answers

Is CVE-2026-21672 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-21672 being exploited in the wild.
How severe is CVE-2026-21672?: High severity, with a CVSS score of 8.8, published 12 March 2026.
Which products and versions are affected?: Veeam Backup & Replication 12, 12.1, 12.2, 12.3, 12.3.1, 12.3.2 (prior to build 12.3.2.4465); Veeam Backup & Replication 13 (prior to build 13.0.1.2067).
Is there a fix for CVE-2026-21672?: A patch was published on 2026-03-12: Fixed in builds 12.3.2.4465 and 13.0.1.2067. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-21672 attacked?: It is attacked with local access, in a network appliance.
Am I affected by CVE-2026-21672?: Check whether anything you run is named in the advisory. 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 local privilege escalation vulnerability exists in Windows-based Veeam Backup & Replication servers. The flaw is categorized as CWE-538 (Insertion of Sensitive Information into Externally-Accessible File or Directory), suggesting that sensitive data or configuration files may be improperly secured, allowing a low-privileged local user to leverage this information to escalate their privileges. An attacker with local access and low-level permissions can achieve full system or administrative control (Scope: Changed). The vulnerability is resolved in Veeam Backup & Replication versions 12.3.2.4465 and 13.0.1.2067.

Affected products

Veeam Backup & Replication 12, 12.1, 12.2, 12.3, 12.3.1, 12.3.2 (prior to build 12.3.2.4465)
Veeam Backup & Replication 13 (prior to build 13.0.1.2067)

Timeline

2026-03-12: disclosed: Initial disclosure via NVD and Veeam KB articles.
2026-03-12: patched: Fixed in builds 12.3.2.4465 and 13.0.1.2067.
2026-04-16: other: Veeam KB articles last modified.

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.