Keypoints
- Veeam published update 12.3.2.4465 (KB ID 4830) on March 12, 2026 to fix seven security issues in Backup & Replication.
- Critical RCE vulnerabilities CVE-2026-21666 and CVE-2026-21667 scored 9.9 and allow authenticated domain users to execute arbitrary code on backup servers.
- Additional high-severity flaws (CVE-2026-21668, CVE-2026-21672, CVE-2026-21708) affect repository file access, local privilege escalation, and RCE as the postgres user.
- Veeam warned that attackers commonly reverse-engineer disclosed patches, so organizations should apply updates without delay to avoid compromise of backup infrastructure.
- The update standardizes network behavior by opening ports 2500–3300 for Veeam Agent for Linux, and newer versions (13.0.1.2067) include further critical fixes such as CVE-2026-21669 and CVE-2026-21671.
Read More: https://thecyberexpress.com/veeam-security-patch-for-backup-replication/