CVE-2025-15536: Byvoid Open Chinese Convert

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Byvoid Open Chinese Convert: up to and including 1.1.9

Published 2026-01-18. Last modified 2026-06-17.