CVE-2025-62787 Wazuh Vulnerable to Heap-based Buffer Over-read in DecodeWinevt
A compromised agent can trigger a buffer over-read in the Wazuh manager to potentially access sensitive data when debug logging is enabled.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-62787?
CVE-2025-62787 is a low-severity vulnerability in Wazuh Wazuh, published on 29 Oct 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Wazuh is a free and open source platform used for threat prevention, detection, and response. Prior to 4.10.2, a buffer over-read occurs in DecodeWinevt() when child_attr[p]->attributes[j] is accessed, because the corresponding index (j) is incorrect. A compromised agent can cause a READ operation beyond the end of the allocated buffer (which may contain sensitive information) by sending a specially crafted message to the wazuh manager. An attacker who is able to craft and send an agent message to the wazuh manager can cause a buffer over-read and potentially access sensitive data. While the buffer over-read is always triggered while resolving the arguments of mdebug2, specific configuration options (analysisd.debug=2) need to be in place for the respective data to be leaked. This vulnerability is fixed in 4.10.2.
Weakness: CWE-126
Which versions are affected by CVE-2025-62787?
It affects 1 product.
Products include Wazuh Wazuh.
How do I fix CVE-2025-62787?
No fix has been published for CVE-2025-62787 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-62787 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-62787 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-3hhq-5367-98q6.