How severe is CVE-2025-15536?

CVE-2025-15536 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2025-15536 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-15536?

CVE-2025-15536 affects Byvoid Open Chinese Convert. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-15536?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-15536 have an EU (EUVD) identifier?

Yes. CVE-2025-15536 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3183.

When was CVE-2025-15536 published?

CVE-2025-15536 was published on 2026-01-18 and last updated on 2026-06-17.

CVE-2025-15536

CVE-2025-15536 is a medium-severity vulnerability in Byvoid Open Chinese Convert with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 4.3
CVSS v4: 1.9
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-3183
Weakness: CWE-787
Affected product: Byvoid Open Chinese Convert
Published: 2026-01-18
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-15536?: 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.
How severe is CVE-2025-15536?: CVE-2025-15536 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2025-15536 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-15536?: CVE-2025-15536 affects Byvoid Open Chinese Convert. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-15536?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-15536 have an EU (EUVD) identifier?: Yes. CVE-2025-15536 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3183.
When was CVE-2025-15536 published?: CVE-2025-15536 was published on 2026-01-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:byvoid:open_chinese_convert:*:*:*:*:*:*:*:*

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