CVE-2025-15536
BYVoid OpenCC MaxMatchSegmentation.cpp MaxMatchSegmentation heap-based overflow
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-122 CWE-119 |
| Vendor | byvoid |
| Product | opencc |
| Published | Jan 18, 2026 |
| Last Updated | Feb 23, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
BYVoid / OpenCC
1.1.0 1.1.1 1.1.2 1.1.3 1.1.4 1.1.5 1.1.6 1.1.7 1.1.8 1.1.9
References
vuldb.com: https://vuldb.com/?id.341708 vuldb.com: https://vuldb.com/?ctiid.341708 vuldb.com: https://vuldb.com/?submit.733347 github.com: https://github.com/BYVoid/OpenCC/issues/997 github.com: https://github.com/BYVoid/OpenCC/pull/1005 github.com: https://github.com/oneafter/1222/blob/main/repro github.com: https://github.com/BYVoid/OpenCC/commit/345c9a50ab07018f1b4439776bad78a0d40778ec github.com: https://github.com/BYVoid/OpenCC/
Credits
🔍 Oneafter (VulDB User)