Critical [CVE-2026-21666 +5] Veeam Backup & Replication: vulnerability allowing local privilege escalation on Windows-based Veeam Backup & Replication servers.
This critical-severity Veeam advisory covers CVE-2026-21666 and CVE-2026-21667 and 4 more CVEs affecting Veeam Backup & Replication.
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Summary
A vulnerability allowing local privilege escalation on Windows-based Veeam Backup & Replication servers.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 9 days ago·verify at source
- 12.3.2.4465
- 12.3.2
Official advisory · high-confidence parse· fetched 9 days ago·verify at source
Mitigation
Upgrade to a fixed release: 12.3.2.4465, 12.3.2. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 9 days ago·verify at source
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