CVE-2025-34124 HIGH

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

Vendor The 3Do Company
Product Heroes of Might and Magic III
Weakness CWE-121
Published July 16, 2025
Last update April 7, 2026

CVSS base score

8.4/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction
Confidentiality
Integrity

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

July 16, 2025 CVE published
April 7, 2026 Record updated