CVE-2026-21708

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

Published: 2026-03-12 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-21708 is rated Moderate Risk (60.7/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 1.09%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-21708

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 1.32% 1.09% -0.23%
2 2026-06-06 1.52% 1.32% -0.19%
3 2026-05-19 — 1.52% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-21708

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.9 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 3.1 6.0 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2026-21708

GitHub Security Advisory for CVE-2026-21708

GHSA-c76v-r5mr-9fpq · Severity: critical — A vulnerability allowing a Backup Viewer to perform remote code execution (RCE) as the postgres...

Affected software / configurations for CVE-2026-21708

Vendor Product Version Raw CPE
veeam veeam_backup_\&_replication >= 12.0.0.1402, < 12.3.2.4465. cpe:2.3:a:veeam:veeam_backup_\&_replication:*:*:*:*:*:*:*:*

References for CVE-2026-21708

URL Tags
https://www.veeam.com/kb4830 Vendor Advisory
https://www.veeam.com/kb4831 Vendor Advisory
cvelogic Threat Intelligence