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Vulnerabilities

Security incident · CVE-2025-34124

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 sp

Published Jul 16, 2025 · catalog updated Apr 7, 2026 · The 3DO Company Heroes of Might and Magic III

Last checked Oct 29, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-34124. EPSS is 0.52%. Act only if a listed version of The 3DO Company Heroes of Might and Magic III is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.4
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.52%
Remediation
Vendor / distro source
Affected products
vendor The 3DO Company Heroes of Might and Magic III HD Mod 3.808 build 9

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor The 3DO Company Heroes of Might and Magic III HD Mod 3.808 build 9HD Mod 3.808 build 9

How to fix CVE-2025-34124

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-34124. EPSS is 0.52%. Act only if a listed version of The 3DO Company Heroes of Might and Magic III is installed.

Which versions are affected?

Compare what you have installed with The 3DO Company Heroes of Might and Magic III HD Mod 3.808 build 9 HD Mod 3.808 build 9. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.52%. There is no CISA KEV listing. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 16, 2025 · EUVD

    Detected

    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

  2. Apr 7, 2026 · EUVD

    Updated

    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

Sources

  • CVE.orgVulnerability recordCVE-2025-34124

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-34124

    30-day exploitation probability 0.52%

    first.org
  • EUVDVulnerability recordEUVD-2025-21747

    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 n

    euvd.enisa.europa.eu
  • Metasploit ModulesPublic exploit moduleexploit_windows/fileformat/homm3_h3m

    Public module reference (normal). Module source is not copied into this catalog.

    rapid7.com

References

Freshness

Last verified in this catalog Oct 27, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • Metasploit ModulesOct 29, 2026
  • FIRST EPSSOct 24, 2026
  • CVE.orgOct 21, 2026
  • EUVDOct 20, 2026