CVE-2024-29850Network attack vector

Account takeover via relayed NTLM authentication

Published May 22, 2024 · Updated Sep 19, 2024

Authentication bypass in Veeam Backup Enterprise Manager before 12.1.2.172 allows remote attackers to take over accounts via NTLM relay. Veeam has not published which request handler accepts relayed NTLM authentication or how the captured exchange is replayed. Exploitation requires a victim to participate in the relayed NTLM exchange, and a successful relay grants the victim account's privileges.

CVSS severity8.8
High
EPSS probability0.81%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Veeam Backup Enterprise Manager before 12.1.2.172 allows remote attackers to take over accounts via NTLM relay. Veeam has not published which request handler accepts relayed NTLM authentication or how the captured exchange is replayed. Exploitation requires a victim to participate in the relayed NTLM exchange, and a successful relay grants the victim account's privileges.

The record

CVE
CVE-2024-29850
Published
May 22, 2024
Updated
Sep 19, 2024
Vendor
Veeam Software
Product
Veeam Backup & Replication
Classifications
CWE-294, T1557.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 22, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 19, 2024Record 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=12.1.2.172 <12.1.2.172

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Veeam Software · Veeam Backup & Replicationversion=12.1.2.172 <12.1.2.172
Veeam Software · Veeam Backup Enterprise Managerversion=0 <12.1.2.172

Published CVSS scores

8.8VeeamCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.8HackerOneCVSS:3.0/AV:N/AC:L/PR:N/UI:R/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-294Authentication Bypass by Capture-replay
T1557.001LLMNR/NBT-NS Poisoning and SMB Relay

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

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Your stack

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