CVE-2026-21666 :: Enginsight Vulnerability Database

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	9.9 CRITICAL	NETWORK	LOW	LOW	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
hackerone	CNA	10 CRITICAL				CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Awaiting analysis

This vulnerability is currently awaiting analysis.

Base Score

CVSS 3.x

EPSS Score

Percentile: Unknown

Common Weakness Enumeration

CWE-284 - Improper Access Control
The software does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Vulnerability Media Exposure

[GERMAN] Veeam Backup & Replication: Kritische Schadcode-Sicherheitslücken entdeckt
In Veeam Backup & Replication schließt das Unternehmen mit Updates mehrere kritische Sicherheitslücken. Sie erlauben Codeschmuggel.
Published: 2026-03-13T08:55:00+00:00
[ENGLISH] 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 (
Published: 2026-03-13T09:45:00+05:30
[ENGLISH] Veeam warns of critical flaws exposing backup servers to RCE attacks
Data protection company Veeam Software has patched multiple flaws in its Backup & Replication solution, including four critical remote code execution (RCE) vulnerabilities. [...]
Published: 2026-03-12T12:59:20-04:00

References

https://www.veeam.com/kb4830