CVE-2025-15536 Details
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.
A heap-based buffer overflow vulnerability has been identified in BYVoid OpenCC versions prior to 1.1.9. The issue arises in the MaxMatchSegmentation function within the file src/MaxMatchSegmentation.cpp. This vulnerability is triggered by improper handling of truncated UTF-8 input, leading to out-of-bounds reads. The vulnerability requires local execution to exploit.
Users are advised to update to the patched version of BYVoid OpenCC. The patch is available in the commit 345c9a50ab07018f1b4439776bad78a0d40778ec on the official OpenCC GitHub repository.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jan 20, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/BYVoid/OpenCC/issues/997 | CISA-ADP | ExploitIssue TrackingPatch |
| https://github.com/BYVoid/OpenCC/ | [email protected] | |
| https://github.com/BYVoid/OpenCC/commit/345c9a50ab07018f1b4439776bad78a0d40778ec | [email protected] | Patch |
| https://github.com/BYVoid/OpenCC/issues/997 | [email protected] | ExploitIssue TrackingPatch |
| https://github.com/BYVoid/OpenCC/pull/1005 | [email protected] | Issue TrackingPatch |
| https://github.com/oneafter/1222/blob/main/repro | [email protected] | Product |
| https://vuldb.com/?ctiid.341708 | [email protected] | Permissions RequiredVDB Entry |
| https://vuldb.com/?id.341708 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/?submit.733347 | [email protected] | ExploitThird Party AdvisoryVDB Entry |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-787 | Out-of-bounds Write | [email protected] |
| CWE-119 | Improper Restriction of Operations within the Bounds of a Memory Buffer | [email protected] |
| CWE-122 | Heap-based Buffer Overflow | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| byvoid open chinese convert | <= 1.1.9 |
CPE
Remediation
| |
Change History
7 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 29, 2026 | Data Remediation | [email protected] |
| Feb 23, 2026 | CVE Modified | [email protected] |
| Feb 6, 2026 | Initial Analysis | [email protected] |
| Jan 20, 2026 | CVE Modified | CISA-ADP |
| Jan 18, 2026 | New CVE Received | [email protected] |