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CVE-2026-21671 is a critical vulnerability in Veeam Backup & Replication affecting high-availability (HA) deployments. It allows an authenticated user holding the Backup Administrator role to perform remote code execution. The issue affects Veeam Backup & Replication 13.x up to and including version 13.0.1.1071, and is fixed in version 13.0.1.2067. Publicly available information identifies the affected product scope, required privilege level, and the resulting ability to execute code remotely, but does not provide sufficient technical detail about the specific vulnerable component or function.
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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.
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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.
16 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Critical remote code execution vulnerability affecting high-availability (HA) Veeam Backup & Replication instances, allowing an authenticated domain user with Backup Administrator privileges to execute code remotely.
A critical vulnerability in Veeam Backup & Replication that allows an authenticated Backup Administrator to execute code in high availability deployments.
A remote code execution vulnerability in high availability deployments of Veeam Backup & Replication that can be exploited by an authenticated user with the Backup Administrator role.
A remote code execution vulnerability in high availability deployments of Veeam Backup & Replication allowing an authenticated Backup Administrator to execute code, affecting versions earlier than 13.0.1.2067.
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.