What is CVE-2026-21670?

CVE-2026-21670 is a high-severity vulnerability in Veeam Backup And Replication, classified under Insufficiently Protected Credentials. CVSS score: 7.7/10. Published 2026-03-12.

How severe is CVE-2026-21670?

High severity. CVSS v3 base score is 7.7 out of 10.

Vulnerability in Veeam Backup And Replication

CVE-2026-21670

A vulnerability allowing a low-privileged user to extract saved SSH credentials.

Published 2026-03-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (33.9th percentile), scored 2026-10-23.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 33.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000

Affected products

Veeam Backup And Replication — versions 13.0.1
Veeam Backup \& Replication

Weakness classification (CWE)

CWE-522 — Insufficiently Protected Credentials

References

www.veeam.com/kb4831 (Vendor Advisory)

Frequently asked questions

What is CVE-2026-21670?: CVE-2026-21670 is a high-severity vulnerability in Veeam Backup And Replication, classified under Insufficiently Protected Credentials. CVSS score: 7.7/10. Published 2026-03-12.
How severe is CVE-2026-21670?: High severity. CVSS v3 base score is 7.7 out of 10.