CVE-2025-15536

low-risk
Published 2026-01-18

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.

Do I need to act?

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0.01% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.3/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Open Chinese Convert

Affected Vendors

Byvoid

References (9)

https://github.com/BYVoid/OpenCC/
Patch https://github.com/BYVoid/OpenCC/commit/345c9a50ab07018f1b4439776bad78a0d40778ec
Exploit https://github.com/BYVoid/OpenCC/issues/997
Issue Tracking https://github.com/BYVoid/OpenCC/pull/1005
Product https://github.com/oneafter/1222/blob/main/repro
Permissions Required https://vuldb.com/?ctiid.341708
Third Party Advisory https://vuldb.com/?id.341708
Exploit https://vuldb.com/?submit.733347
Exploit https://github.com/BYVoid/OpenCC/issues/997
23
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal