# CVE-2024-29850: Auth bypass in Backup & Replication

> Attackers can take over accounts in Veeam Backup Enterprise Manager via NTLM relay attacks, requiring immediate patching.

- **Severity:** High 8.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 22 May 2024
- **Updated:** 19 Sep 2024
- **Also known as:** GHSA-2874-f7gx-365p

## What is CVE-2024-29850?

CVE-2024-29850 is a high-severity authentication bypass vulnerability in Veeam Backup & Replication, published on 22 May 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Veeam Backup Enterprise Manager allows account takeover via NTLM relay.

Weakness: CWE-294 (Authentication Bypass by Capture-replay)

## Which versions are affected by CVE-2024-29850?

It affects 1 product.


Products: Veeam Veeam Backup \& Replication.

## How do I fix CVE-2024-29850?

No fix has been published for CVE-2024-29850 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-29850 being exploited?

There is no known exploitation of CVE-2024-29850 in the wild and no public exploit code.

## Other vulnerabilities in Veeam Backup & Replication

- [CVE-2024-40711](https://insights.sbomify.com/CVE-2024-40711/): Veeam Backup and Replication Deserialization (critical 9.8, exploited in the wild)
- [CVE-2022-26501](https://insights.sbomify.com/CVE-2022-26501/): Veeam Backup & Replication Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2022-26500](https://insights.sbomify.com/CVE-2022-26500/): Veeam Backup & Replication Remote Code Execution (high 8.8, exploited in the wild)
- [CVE-2023-27532](https://insights.sbomify.com/CVE-2023-27532/): Veeam Backup & Replication Cloud Connect Missing Authentication for Critical Function (high 7.5, exploited in the wild)
- [CVE-2026-21666](https://insights.sbomify.com/CVE-2026-21666/): Missing authorization in Backup and Replication (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-29850 and fix it if it is affected.

What it is: CVE-2024-29850 is a high-severity authentication bypass vulnerability in Veeam Backup & Replication, published on 22 May 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2024-29850 in the wild and no public exploit code.

Affected product: Veeam Backup & Replication. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2024-29850/ (Markdown: https://insights.sbomify.com/CVE-2024-29850/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-29850
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-29850
- OSV: https://osv.dev/vulnerability/CVE-2024-29850

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-29850/
Summaries are generated and may contain mistakes; the official description above is the record.