Veeam Backup & Replication is widely used in enterprises; SYSTEM-level code execution on backup servers risks full infrastructure compromise, data loss, and tampering—newsworthy and disruptive.
CVE-2025-64393
Backup Viewer can execute arbitrary code as SYSTEM on Veeam backup servers.
Is CVE-2025-64393 being exploited?
Not confirmed. CVE-2025-64393 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked.
How severe is CVE-2025-64393?
CVE-2025-64393 is rated Critical with a CVSS score of 9.4. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2025-64393?
Not known from our data. No patch reference has been recorded for CVE-2025-64393, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2025-64393 affect?
CVE-2025-64393 affects Veeam Backup & Replication, Veeam backup servers. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2025-64393?
Restrict Backup Viewer accounts, isolate backup servers, monitor logs, apply vendor update when released.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated Backup Viewer can run arbitrary code as SYSTEM on the backup server, enabling full takeover, backup tampering, data theft, and persistence for ransomware.
Immediate action required
- affected>= 12 and < 12.3.2.4934
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.