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CVE-2026-44963 is a critical remote code execution vulnerability in Veeam Backup & Replication affecting version 12.3.2.4465 and all earlier 12.x builds. The issue is described as a deserialization vulnerability and is mapped to CWE-502. It allows an authenticated domain user to execute arbitrary code remotely on the Veeam Backup Server over the network. The vulnerable condition applies to domain-joined backup server deployments; workgroup deployments are not affected by this specific attack vector. Veeam stated that architectural changes in version 13 prevent this issue in 13.x builds.
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No valid public exploits. Mallory filtered out 2 candidates as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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.
46 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical authenticated remote code execution vulnerability affecting Veeam Backup & Replication on domain-joined backup servers running vulnerable version 12 builds.
A critical remote code execution vulnerability in Veeam Backup & Replication that allows an authenticated domain user to achieve RCE on domain-joined backup servers.
A critical remote code execution vulnerability in Veeam Backup & Replication 12.x that allows an authenticated low-privileged domain user to execute code on the backup server, potentially resulting in full system compromise.
A critical authenticated remote code execution vulnerability in Veeam Backup & Replication that affects domain-joined backup servers, allowing any authenticated domain user to execute arbitrary code on the backup server.
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.