CVE-2025-64393 Deserialization in Backup and Replication
A Backup Viewer can execute arbitrary code as SYSTEM on the Veeam Backup & Replication server due to unsafe deserialization.
- 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-2025-64393?
CVE-2025-64393 is a critical unsafe deserialization vulnerability in Veeam Backup and Replication, published on 7 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
This vulnerability in Veeam Backup & Replication allows a Backup Viewer to execute arbitrary code as SYSTEM on the backup server.
Weakness: CWE-502
Which versions are affected by CVE-2025-64393?
How do I fix CVE-2025-64393?
No fix has been published for CVE-2025-64393 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-2025-64393 being exploited?
There is no known exploitation of CVE-2025-64393 in the wild and no public exploit code.
Sources
Also known as GHSA-6m95-66x2-x5hx.