CVE-2026-21709 Security feature bypass in Backup and Replication
Local administrators can bypass Windows Driver Signature Enforcement in Veeam Backup and Replication, enabling execution of unsigned drivers.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-21709?
CVE-2026-21709 is a medium-severity vulnerability in Veeam Backup and Replication, published on 17 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability allowing a local attacker with administrator privileges to bypass Windows Driver Signature Enforcement.
Weakness: CWE-77
Which versions are affected by CVE-2026-21709?
How do I fix CVE-2026-21709?
No fix has been published for CVE-2026-21709 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-21709 being exploited?
There is no known exploitation of CVE-2026-21709 in the wild and no public exploit code.
Sources
Also known as CVE-2025-63750, GHSA-v446-j5j2-jvvp.