CVE-2026-25769 Wazuh Cluster vulnerable to Remote Code Execution via Insecure Deserialization
An attacker with access to a worker node can achieve remote code execution with root privileges on the master node via insecure deserialization.
- 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-2026-25769?
CVE-2026-25769 is a critical unsafe deserialization vulnerability in Wazuh Wazuh, published on 17 Mar 2026. 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. Versions 4.0.0 through 4.14.2 have a Remote Code Execution (RCE) vulnerability due to Deserialization of Untrusted Data). All Wazuh deployments using cluster mode (master/worker architecture) and any organization with a compromised worker node (e.g., through initial access, insider threat, or supply chain attack) are impacted. An attacker who gains access to a worker node (through any means) can achieve full RCE on the master node with root privileges. Version 4.14.3 fixes the issue.
Weakness: CWE-502
Which versions are affected by CVE-2026-25769?
It affects 1 product.
Products include Wazuh Wazuh.
How do I fix CVE-2026-25769?
No fix has been published for CVE-2026-25769 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-25769 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-25769 exists.
Public exploit code: 4 proofs of concept on GitHub.
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-3gm7-962f-fxw5.