Name: CVE-2025-15536: Heap-based Buffer Overflow
Creator: Rapid7
Published: 2026-01-18T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2025-15536, CVSS 5.3, EPSS 0.00256

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.

CVSS Details

CVSS 4.0 Base Score: 1.9 (LOW)
CVSS 4.0 Vector: (CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)
CVSS 3.1 Base Score: 5.3
CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Alpine Linux	—	Upgrade opencc	Aug 19, 2026	Jan 18, 2026
Debian	—	Upgrade opencc	Jul 23, 2026	Jul 23, 2026
Redhat_linux	—	No solution exists	Jul 17, 2026	Jan 18, 2026
Ubuntu	—	Upgrade openccUpgrade libopencc2 (Ubuntu Pro)Upgrade opencc (Ubuntu Pro)Upgrade libopencc1.1	Jan 22, 2026	Jan 18, 2026

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CVSS Details

Covered by Rapid7

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