CVE-2026-44963 Deserialization in Backup and Replication
An authenticated domain user can achieve remote code execution on the Veeam Backup Server via a deserialization vulnerability.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-44963?
CVE-2026-44963 is a critical unsafe deserialization vulnerability in Veeam Backup and Replication, published on 9 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability allowing remote code execution (RCE) on the Backup Server by an authenticated domain user.
Weakness: CWE-502
Which versions are affected by CVE-2026-44963?
How do I fix CVE-2026-44963?
No fix has been published for CVE-2026-44963 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-44963 being exploited?
There is no known exploitation of CVE-2026-44963 in the wild and no public exploit code.
Public exploit code: 2 proofs of concept on GitHub.
Sources
Also known as GHSA-qgvw-vfmj-prrg.