High severity · published Mar 12, 2026
CVE-2026-21667
A vulnerability allowing an authenticated domain user to perform remote code execution (RCE) on the Backup Server
8.8
CVSS
1.1%
EPSS
No
On KEV
Description
A vulnerability allowing an authenticated domain user to perform remote code execution (RCE) on the Backup Server.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.1% · higher than 67% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BR
Backup & Replication · Veeam
12.0.0.1402 before 12.3.2.4465 · source: NVD
In the news
VulnerabilityCritical
Veeam Patches 7 Critical Backup & Replication Flaws Allowing Remote Code Execution
Veeam has released security updates to address multiple critical vulnerabilities in its Backup & Replication software that, if successfully exploited, could result in remote code execution.
The vulnerabilities are as follows -
CVE-2026-21666 (CVSS score: 9.9) - A vulnerability that allows an authenticated domain user to perform remote code execution on the Backup Server.
CVE-2026-21667 (
Mar 13, 2026·The Hacker News
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-21667
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-21667
Vendor Advisory
https://www.veeam.com/kb4830
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