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CVE-2026-21671

Veeam Backup & Replication remote code execution

9.1 CRITICALEPSS 1.33%
  1. Published12 Mar 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredHigh
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected products

Veeam Backup & Replication≥ 13.0.0.496 ≤ 13.0.1.1071

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

Patch & vendor advisories

References

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Frequently asked

Is CVE-2026-21671 being actively exploited?

CVE-2026-21671 is not in the CISA KEV catalog. Its EPSS exploit probability is 1.33%.

How severe is CVE-2026-21671?

CVE-2026-21671 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 1.33% probability of exploitation.

Which products are affected by CVE-2026-21671?

Affected products include Veeam Backup & Replication.

How do I fix CVE-2026-21671?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-21671 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.