CVE-2024-40711Known exploitationPublic exploitNetwork attack vector

Remote code execution via unsafe deserialization

Published Sep 7, 2024 · Updated Oct 21, 2025

Deserialization of untrusted data in Veeam Backup & Replication 12.1.2.172 and earlier allows attackers to execute code remotely. The .NET Remoting endpoint accepts a BinaryFormatter payload containing a CDbCryptoKeyInfo gadget and instantiates it during deserialization. Remote attackers need no account against 12.1.1.56 and earlier; 12.1.2.172 requires a low-privileged account, and successful exploitation runs arbitrary commands on the backup server.

CVSS severity9.8
Critical
EPSS probability90.37%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization of untrusted data in Veeam Backup & Replication 12.1.2.172 and earlier allows attackers to execute code remotely. The .NET Remoting endpoint accepts a BinaryFormatter payload containing a CDbCryptoKeyInfo gadget and instantiates it during deserialization. Remote attackers need no account against 12.1.1.56 and earlier; 12.1.2.172 requires a low-privileged account, and successful exploitation runs arbitrary commands on the backup server.

The record

CVE
CVE-2024-40711
Published
Sep 7, 2024
Updated
Oct 21, 2025
Vendor
Paragon Software Group
Product
Backup & Recovery
Classifications
CWE-502, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 7, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=12.1.2 <=12.1.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Paragon Software Group · Backup & Recoveryversion=12.1.2 <=12.1.2
Veeam Software · Veeam Backup & Replicationversion=0 <=12.2.0.334

Published CVSS scores

9.8CVE Program CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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