# CVE-2025-34124: Heroes of Might and Magic III .h3m Map File Buffer Overflow

> Attackers can execute arbitrary code by tricking users into opening malicious .h3m map files in Heroes of Might and Magic III.

- **Severity:** High 8.4 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 16 Jul 2025
- **Updated:** 7 Apr 2026
- **Also known as:** GHSA-72f4-q73h-wfwq

## What is CVE-2025-34124?

CVE-2025-34124 is a high-severity memory corruption vulnerability in The 3DO Company Heroes of Might and Magic III, published on 16 Jul 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

A buffer overflow vulnerability exists in Heroes of Might and Magic III Complete 4.0.0.0, HD Mod 3.808 build 9, and Demo 1.0.0.0 via malicious .h3m map files that exploit object sprite name parsing logic. The vulnerability occurs during in-game map loading when a crafted object name causes a buffer overflow, potentially allowing arbitrary code execution. Exploitation requires the victim to open a malicious map file within the game.

Weakness: CWE-20 (Improper Input Validation), CWE-94 (Improper Control of Generation of Code), CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2025-34124?


## How do I fix CVE-2025-34124?

No fix has been published for CVE-2025-34124 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-34124 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-34124 exists.

Public exploit code:

- Heroes of Might and Magic III .h3m Map file Buffer Overflow (metasploit)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-34124 and fix it if it is affected.

What it is: CVE-2025-34124 is a high-severity memory corruption vulnerability in The 3DO Company Heroes of Might and Magic III, published on 16 Jul 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-34124 exists.

Affected product: The 3DO Company Heroes of Might and Magic III. 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-2025-34124/ (Markdown: https://insights.sbomify.com/CVE-2025-34124/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-34124
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-34124
- OSV: https://osv.dev/vulnerability/CVE-2025-34124

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-34124/
Summaries are generated and may contain mistakes; the official description above is the record.