CVE-2026-21666 | BDVDB-2026-320191 Detail

VeeamBackup and Replication

Description#

A vulnerability allowing an authenticated domain user to perform remote code execution (RCE) on the Backup Server.

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: network.

No public exploit known

10.0 Critical

1.2%, Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 70.4.

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Improper Access Control

No specific action is recorded in the source data. Check the references for vendor guidance.

Not available

10.0 Critical

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Not available

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).