Veeam has released urgent security updates for its Backup and Replication software to address seven critical flaws. 💾
CVE-2026-21666 · Severity 9.9 · Remote Code Execution in Veeam Backup and Replication.
The most severe flaws allow authenticated domain users or even those with limited Backup Viewer permissions to achieve full RCE on the backup server. This is a high-impact risk for ransomware scenarios‚ as attackers often target backup infrastructure to ensure victims cannot recover data without paying.
Because backup servers hold high-privilege credentials for the entire virtualized estate‚ an RCE here is a ‘keys to the kingdom’ scenario. Several of these flaws require no user interaction beyond the initial authentication foothold.
The uncomfortable truth: Your last line of defense—your backups—is a primary target for attackers looking to maximize their leverage.
→ Update @[Veeam](urn:li:organization:1053424) Backup and Replication to the latest patched version (v12.1.2.172+ or v12.2+) today.
→ Restrict administrative access to your backup console to a dedicated‚ isolated management network.
→ Audit your backup server for any unauthorized account creation or anomalous database queries.
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