CVE-2026-21671 | BDVDB-2026-320196 Detail

VeeamSoftware Appliance

Description#

A vulnerability allowing an authenticated user with the Backup Administrator role to perform remote code execution (RCE) in high availability (HA) deployments of Veeam Backup & Replication.

Impact#

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

Weaknesses#

CWE-693 Protection Mechanism Failure

References#

https://www.veeam.com/kb4831

Exploit#

No public exploit known

History#

Version 12026-03-12Record published in the CVE List.
Version 22026-05-10Most recent update recorded in the CVE List.

Published

Published: 2026-03-12
Last modified: 2026-05-10

Vendor information

Vendor: Veeam
Product: Software Appliance

All Veeam vulnerabilities

Score

9.1 Critical

EPSS

1.4%, Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 73.8.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

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

Affected Systems

Vulnerable
>= 13.0.1 and < 13.0.1
Fixed
13.0.1

Scoring System

CVSS v4.0

Not available

CVSS v3.1

9.1 Critical

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

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	High
User Interaction	None
Scope	Changed
Confidentiality	High
Integrity	High
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

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