What is CVE-2023-27532?

CVE-2023-27532 is a high-severity vulnerability in Veeam Backup \& Replication, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2023-03-10.

How severe is CVE-2023-27532?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2023-27532 known to be exploited?

Yes. CVE-2023-27532 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-08-22), indicating it is being actively exploited. 17 public proof-of-concept repositories are indexed.

Auth bypass in Veeam Backup \& Replication

CVE-2023-27532

Vulnerability in Veeam Backup & Replication component allows encrypted credentials stored in the configuration database to be obtained. This may lead to gaining access to the backup infrastructure hosts.

Vulnerability class: Broken Authentication

Published 2023-03-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.813 (99.6th percentile), scored 2026-10-19.

High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.776 · newest: 0.813 · change: +0.037

Affected products

Veeam Backup \& Replication — versions 11.0.1.1261, 12.0.0.1420
Veeam Backup & Replication — versions Fixed Versions: v12 (build 12.0.0.1420 P20230223), 11a (build 11.0.1.1261 P20230227)

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2023-08-22. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2023-09-12.

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Known ransomware campaign use: yes.

Public proof-of-concept exploits

References

www.veeam.com/kb4424 (Vendor Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2023-27532?: CVE-2023-27532 is a high-severity vulnerability in Veeam Backup \& Replication, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2023-03-10.
How severe is CVE-2023-27532?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2023-27532 known to be exploited?: Yes. CVE-2023-27532 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-08-22), indicating it is being actively exploited. 17 public proof-of-concept repositories are indexed.