Is CVE-2025-15536 in the CISA KEV catalog?

No. CVE-2025-15536 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-15536?

CVE-2025-15536 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2025-15536?

CVE-2025-15536 has an EPSS score of 0.23% (14th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-15536?

Upgrade opencc on debian unstable to 1.1.9+ds1-4 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2025-15536

MEDIUM

5.3

CVSS v3

NVD

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.

CWE-119Buffer Overflow CWE-122Heap-based Buffer Overflow CWE-787Out-of-bounds Write

How to fix

Remediation Available

openccDebian

Fixed in:1.1.9+ds1-4CVE-2025-15536

libopencc1.1Ubuntu

Fixed in:1.1.3+ds1-3ubuntu3.1USN-7972-1

Fixed in:1.1.7+ds1-1ubuntu0.1USN-7972-1

Fixed in:1.1.9+ds1-2ubuntu0.1USN-7972-1

libopencc2Ubuntu

Fixed in:1.0.4-5ubuntu0.1~esm1USN-7972-2

Fixed in:1.0.5+git20190530-1ubuntu0.1~esm1USN-7972-2

openccUbuntu

Fixed in:1.0.4-5ubuntu0.1~esm1USN-7972-2

Fixed in:1.0.5+git20190530-1ubuntu0.1~esm1USN-7972-2

Fixed in:1.1.3+ds1-3ubuntu3.1USN-7972-1

Fixed in:1.1.7+ds1-1ubuntu0.1USN-7972-1

Fixed in:1.1.9+ds1-2ubuntu0.1USN-7972-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityLow

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Exploit Intelligence

0.23%probability of exploitation in 30 days

14thpercentile

Low risk: more likely to be exploited than 14% of all known CVEs.

References

Patch3

Exploit1

vuldb.com

Third-Party Advisory1

vuldb.com

VDB Entry1

vuldb.com

Product1

github.com

Other references1

github.com

Related Vulnerabilities

Other CWE-119 (Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-4966	Critical	9.4	100%	KEV + Ransom	Fix
CVE-2017-11882	High	7.8	100%	KEV + Ransom	-
CVE-2020-0796	Critical	10.0	100%	KEV + Ransom	-
CVE-2008-4250	Critical	9.8	99%	KEV	-
CVE-2017-15944	Critical	9.8	98%	KEV	Fix
CVE-2015-0014	High	10.0	97%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-29.