What is CVE-2025-59938?

CVE-2025-59938 is a medium-severity vulnerability in Wazuh, classified under Heap-based Buffer Overflow. CVSS score: 6.5/10. Published 2025-09-27.

How severe is CVE-2025-59938?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2025-59938 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Wazuh

CVE-2025-59938

Wazuh is a free and open source platform used for threat prevention, detection, and response. In versions starting from 3.8.0 to before 4.11.0, wazuh-analysisd is vulnerable to a heap buffer overflow when parsing XML elements from Windows EventChannel messages. This issue has been patched in version 4.11.0.

Vulnerability class: Buffer Overflow

EPSS: 0.003 (26.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Wazuh — versions >= 3.8.0, < 4.11.0

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2025-59938?: CVE-2025-59938 is a medium-severity vulnerability in Wazuh, classified under Heap-based Buffer Overflow. CVSS score: 6.5/10. Published 2025-09-27.
How severe is CVE-2025-59938?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2025-59938 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.