Widely used backup software; LPE on Windows could lead to SYSTEM access, credential theft, and lateral movement.
CVE-2026-21672
Local privilege escalation on Windows Veeam Backup & Replication servers.
Is CVE-2026-21672 being exploited?
Not confirmed. CVE-2026-21672 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. EPSS currently estimates a 0.22% probability of exploitation in the next 30 days.
How severe is CVE-2026-21672?
CVE-2026-21672 is rated High with a CVSS score of 8.8. 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-2026-21672?
Yes. A fix has been recorded for CVE-2026-21672. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-21672 affect?
CVE-2026-21672 affects Veeam Backup & Replication (Windows). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-21672?
Apply vendor patch; verify deployment and backups.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Local privilege escalation to SYSTEM on Veeam Backup & Replication servers; could enable credential access and lateral movement.
Immediate action required
- affected>= 12 and < 12.3.2
- affected>= 13 and < 13.0.1
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.