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CVE-2026-21672 is a high-severity local privilege escalation vulnerability affecting Windows-based Veeam Backup & Replication servers. The issue allows an attacker who already has limited local access on a vulnerable server to elevate privileges on the underlying Windows system. Publicly available information identifies the flaw as affecting Veeam Backup & Replication versions earlier than 12.3.2.4465 in the 12.x branch and earlier than 13.0.1.2067 in the 13.x branch. The published CVSS v3.1 vector indicates a local attack path, low attack complexity, low privileges required, no user interaction, changed scope, and high impact to confidentiality, integrity, and availability.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
14 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
High-severity local privilege escalation vulnerability affecting Windows servers running Veeam Backup & Replication.
A high-severity local privilege escalation vulnerability affecting Windows-based Veeam Backup & Replication servers.
A high-severity local privilege escalation vulnerability affecting Windows-based Veeam Backup & Replication servers that allows an attacker with limited local access to elevate privileges.
A local privilege escalation vulnerability affecting Windows-based Veeam Backup & Replication servers.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.