CVE-2025-15536CWE-119CWE-122

BYVoid OpenCC MaxMatchSegmentation.cpp MaxMatchSegmentation heap-based overflow

Medium · published January 18, 2026

CVSS v4.0
4.8
EPSS
0%
Percentile
15.8
In the wild
Unconfirmed
What it is

A weakness has been identified in BYVoid OpenCC up to 1.1.9. This vulnerability affects the function opencc::MaxMatchSegmentation of the file src/MaxMatchSegmentation.cpp. This manipulation causes heap-based buffer overflow. The attack is restricted to local execution. The exploit has been made available to the public and could be used for attacks. Patch name: 345c9a50ab07018f1b4439776bad78a0d40778ec. To fix this issue, it is recommended to deploy a patch.

The record
Technical detail
CVSS v4.0
4.8 · MEDIUM
Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
EPSS
0.00252 · 15.8th percentile
Weaknesses
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer; CWE-122 · Heap-based Buffer Overflow
Published
2026-01-18T09:02Z
EPSS history
Timeline
  • 18 JAN 09:02Z
    BYVoid OpenCC MaxMatchSegmentation.cpp MaxMatchSegmentation heap-based overflow
    cvelistv5