CVE-2025-15536: A weakness has been identified in BYVoid OpenCC up to 1.1.9

Q: How do I fix CVE-2025-15536?

open chinese convert: upgrade to newer than 1.1.9. Exact commands for each OS are on this page.

Q: Is CVE-2025-15536 being exploited?

CVE-2025-15536 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-15536 affect?

CVE-2025-15536 affects open chinese convert. Severity is medium (CVSS 5.3). 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 r

Q: How urgent is CVE-2025-15536?

Priority 28/100. Public exploit reference

Routine

MEDIUM 5.3UPGRADE

CVE-2025-15536 is a medium-severity flaw (CVSS 5.3) affecting open chinese convert. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 deplo

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 83%)
CISA exploited list	No
Weakness	CWE-119, CWE-122, CWE-787
Published	2026-01-18
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: byvoid

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-01-18 09:15 UTCPublished CVE record published
2026-06-17 08:37 UTCUpdated Record last modified

byvoid open chinese convert UPGRADE

Affected: <= 1.1.9

Fixed in: newer than 1.1.9

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy open-chinese-convert || rpm -q open-chinese-convert || open-chinese-convert --version

2. UPGRADE to newer than 1.1.9 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade open-chinese-convert

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade open-chinese-convert

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-15536?

open chinese convert: upgrade to newer than 1.1.9. Exact commands for each OS are on this page.

Is CVE-2025-15536 being exploited?

CVE-2025-15536 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-15536 affect?

CVE-2025-15536 affects open chinese convert. Severity is medium (CVSS 5.3). 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 r

How urgent is CVE-2025-15536?

Priority 28/100. Public exploit reference

References

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