CVE-2025-59938 Heap buffer overflow in wazuh-analysisd
Heap buffer overflow in Wazuh analysis daemon allows attackers to execute arbitrary code or cause denial of service via crafted Windows EventChannel messages.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-59938?
CVE-2025-59938 is a medium-severity memory corruption vulnerability in Wazuh Wazuh, published on 27 Sep 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-122
Which versions are affected by CVE-2025-59938?
It affects 1 product.
Products include Wazuh Wazuh.
How do I fix CVE-2025-59938?
No fix has been published for CVE-2025-59938 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-59938 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-59938 exists.
Other vulnerabilities in Wazuh Wazuh
- CVE-2025-24016 Wazuh Server Deserialization of Untrusted Data
- CVE-2024-32038 Wazuh Analysis Engine Event Decoder Heap-based Buffer Overflow Remote Code Execution Vulnerability
- CVE-2021-44079 Command injection in n/a
- CVE-2024-1243 Remote code execution and local privilege escalation in Wazuh Windows agent via NetNTLMv2 hash theft
- CVE-2026-61800 Wazuh cluster worker file sync allows arbitrary file write under /var/ossec (incomplete fix for CVE-2026-30893)
Sources
Also known as GHSA-vw3r-mjg3-9hh2.