How severe is CVE-2024-40711?

CVE-2024-40711 has a CVSS 3.0 base score of 9.8 (CRITICAL). EPSS estimates a 90.4% probability of exploitation in the next 30 days. It is listed in the CISA Known Exploited Vulnerabilities catalog.

CVE-2024-40711: Veeam Backup and Replication Deserialization

CISA Known Exploited Vulnerabilities

Veeam Backup and Replication Deserialization Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.

Added to KEV

2024-10-17

Remediation due

2024-11-07

Ransomware

Known use

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

CISA notes
https://www.veeam.com/kb4649 ; https://nvd.nist.gov/vuln/detail/CVE-2024-40711

Description

A deserialization of untrusted data vulnerability with a malicious payload can allow an unauthenticated remote code execution (RCE).

Severity

CVSS 3.0 · CNA9.8 CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC · CISA-ADP

Exploitationactive

Automatableyes

Technical impacttotal

Exploitation Context

as of October 15, 2026

All KEV statistics→

CISA added CVE-2024-40711 to the KEV catalog 40 days after its CVE record was published. The median for entries added in 2024 is 21.5 days.
It is one of 4 Veeam entries in the CISA KEV catalog, and the only one added in 2024.
Its current EPSS score (90.4%) is higher than that of 73% of CISA KEV entries.

Affected Products

Vendor	Product	Affected versions
Veeam	Veeam Backup and Recovery	12.1.2 to 12.1.2

References

1 Links

Other references

https://www.veeam.com/kb4649

Record Details

Published

2024-09-07

Last updated

2025-10-21

Assigner (CNA)

hackerone

Credited to

CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.