CVE-2026-21708 — CRITICAL (9.9)

Vulnerability Description

A vulnerability allowing a Backup Viewer to perform remote code execution (RCE) as the postgres user.

CVSS Score

9.9

CRITICAL

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

LOW

Related Weaknesses (CWE)

CWE-89

References

https://www.veeam.com/kb4830
https://www.veeam.com/kb4831

FAQ

What is CVE-2026-21708?

CVE-2026-21708 is a vulnerability with a CVSS score of 9.9 (CRITICAL). A vulnerability allowing a Backup Viewer to perform remote code execution (RCE) as the postgres user.

How severe is CVE-2026-21708?

CVE-2026-21708 has been rated CRITICAL with a CVSS base score of 9.9/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-21708?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.