CVE-2025-59938: wazuh Heap-based Buffer Overflow

Vulnerability summary

CVE-2025-59938 is a medium (CVSS 6.5) Heap-based Buffer Overflow vulnerability in wazuh. EPSS estimates a 0.38% chance of exploitation in the next 30 days, higher than 30% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 27-09-2025
   PublishedVulnerability first disclosed.
2. 29-09-2025
   Last modifiedVulnerability information updated.

Description

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.

• CWE-122Heap-based Buffer OverflowA heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().