Deserialization in Wazuh
CVE-2026-25769
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.
Vulnerability class: Insecure Deserialization
EPSS: 0.092 (94.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Wazuh — versions >= 4.0.0, < 4.14.3
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
- security-advisories@github.com (x_refsource_MISC, Broken Link)
Frequently asked questions
- What is CVE-2026-25769?
- CVE-2026-25769 is a critical-severity vulnerability in Wazuh, classified under Deserialization of Untrusted Data. CVSS score: 9.1/10. Published 2026-03-17.
- How severe is CVE-2026-25769?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2026-25769 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.