VulnTideExploited vulnerabilities, by vendor. Data as of .
Known exploitedIn CISA's KEV catalog since Ransomware use: known
Veeam Backup & Replication

CVE-2024-40711: Veeam Backup and Replication Deserialization Vulnerability

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on , 40 days after the CVE record was published.

How likely is exploitation in the next 30 days?
90.4%

EPSS score, percentile 99.8 of all scored records

How severe?
9.8 Critical

CVSS v3.0 base score, given by the CNA

What should I do?

CISA deadline . Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

The CVE record links no vendor advisory, patch or mitigation.

Which versions are affected?

Affected

  • 12.1.2 through 12.1.2

Versions by product

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of ; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of ; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of . About the data.

What to do

Required action, set by CISA

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

CISA due date for this action: .

Advisories and patches

The CVE record links no vendor advisory, patch or mitigation.

Linked from CISA's catalog entry

Affected products and versions

As listed in the CVE record.

Veeam Backup and Recovery
StatusVersions
Affected12.1.2 through 12.1.2

Versions not listed are: unaffected.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of . About the data.

About this vulnerability

Veeam Backup and Replication contains a deserialization vulnerability allowing an unauthenticated user to perform remote code execution.

Summary: CISA's KEV catalog, as of .

  • CISA added CVE-2024-40711 to its Known Exploited Vulnerabilities (KEV) catalog on 17 Oct 2024.
  • CISA marks it as known to be used in ransomware campaigns.
  • The due date CISA sets for the required action is 7 Nov 2024.
  • The CVE record was published on 7 Sep 2024, 40 days before it was added to KEV.
  • The CVE record carries a CVSS v3.0 base score of 9.8 (Critical), given by its CNA.
  • FIRST's EPSS model puts the probability of exploitation in the next 30 days at 90.4% (percentile 99.8), as of 28 Oct 2026.
  • CISA's SSVC assessment in the CVE record: exploitation active, automatable yes, technical impact total.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of ; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of ; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of . About the data.

Description

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

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of . About the data.

Weakness

  • CWE-502: Deserialization of Untrusted Data

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.

Timeline

DateEvent
CVE record published
Added to CISA KEV
CISA due date for the required action
CVE record last updated

References

More exploited Veeam vulnerabilities

  • CVE-2023-27532: Veeam Backup & Replication Cloud Connect Missing Authentication for Critical Function Vulnerability (added )
  • CVE-2022-26500: Veeam Backup & Replication Remote Code Execution Vulnerability (added )
  • CVE-2022-26501: Veeam Backup & Replication Remote Code Execution Vulnerability (added )