Heap-based buffer overflow in opencc - CVE-2025-15536
Published: February 3, 2026
Vulnerability identifier: #VU122271
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2025-15536
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: opencc.byvoid.com
Affected software:
opencc
opencc
Detailed vulnerability description
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to a boundary error within the opencc::MaxMatchSegmentation() function in src/MaxMatchSegmentation.cpp. A remote attacker can pass specially crafted data to he application, trigger a heap-based buffer overflow and execute arbitrary code on the target system.
How to mitigate CVE-2025-15536
Install update from vendor's website.