Buffer overflow in Byvoid Opencc
CVE-2025-15536
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.
Vulnerability class: Buffer Overflow
EPSS: 0.002 (14.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Byvoid Opencc — versions 1.1.0, 1.1.1, 1.1.2
- Byvoid Open_chinese_convert
Weakness classification (CWE)
References
- cna@vuldb.com (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- cna@vuldb.com (signature, Permissions Required, permissions-required, VDB Entry)
- cna@vuldb.com (Exploit, VDB Entry, Third Party Advisory, third-party-advisory)
- cna@vuldb.com (issue-tracking, Exploit, Patch, Issue Tracking)
- cna@vuldb.com (issue-tracking, Patch, Issue Tracking)
- cna@vuldb.com (Product, exploit)
- cna@vuldb.com (Patch, patch)
- cna@vuldb.com (product)
Frequently asked questions
- What is CVE-2025-15536?
- CVE-2025-15536 is a medium-severity vulnerability in Byvoid Opencc, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2026-01-18.
- How severe is CVE-2025-15536?
- Medium severity. CVSS v3 base score is 5.3 out of 10.