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CVE-2025-15536

5.3 · MEDIUM

A weakness has been identified in BYVoid OpenCC up to 1.1.9.

Published Jan 18, 2026CWE-119EPSS 0.25%

Overview

CVE-2025-15536 is a medium-severity vulnerability. It was published on January 18, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/BYVoid/OpenCC/GitHubgithub.com/BYVoid/OpenCC/commit/345c9a50ab07018f1b4439776bad78a0d40778ecGitHubgithub.com/BYVoid/OpenCC/issues/997GitHubgithub.com/BYVoid/OpenCC/pull/1005GitHubgithub.com/oneafter/1222/blob/main/reproRefvuldb.com/?ctiid.341708Refvuldb.com/?id.341708Refvuldb.com/?submit.733347GitHubgithub.com/BYVoid/OpenCC/issues/997

How CyberStrike helps

Frequently asked questions

What is CVE-2025-15536?

CVE-2025-15536 is a medium-severity vulnerability. It was published on January 18, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2025-15536?

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2025-15536?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-15536?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-15536 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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