Vulnerability · Published Oct 7, 2026 · Assigned by hackerone
CVE-2025-64393
Critical 9.4
In plain English
A critical-severity unsafe deserialization in Backup and Replication from Veeam. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 5.2% (higher than 93% of all known vulnerabilities).
Severity (CVSS 4.0)9.4Critical
Exploit odds (30 days)5.2%top 7.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
This vulnerability in Veeam Backup & Replication allows a Backup Viewer to execute arbitrary code as SYSTEM on the backup server.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Veeam | Backup and Replication | 12 – before 12.3.2.4934 |
Weakness: CWE-502 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H