{"id":"CVE-2026-54084","title":"Wazuh is an open-source security platform providing unified XDR and SIEM protection for endpoints and cloud workloads","summary":"Wazuh is an open-source security platform providing unified XDR and SIEM protection for endpoints and cloud workloads. In versions 4.0.0 through 4.14.6, a malicious or man-in-the-middle enrollment manager can crash a Wazuh agent during e…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H","cwe":["CWE-476"],"vendor":"wazuh","product":"wazuh","affected":["wazuh >= 4.0.0, < 4.14.7"],"patched":["wazuh 4.14.7"],"published":"2026-08-28","updated":"2026-09-15","sourceUpdated":"2026-09-15T19:16:22.553","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-54084","references":[{"url":"https://github.com/wazuh/wazuh/commit/7dfbb4a292bc6ae8e3bb4c1982f687f35216a748","label":"security-advisories@github.com"},{"url":"https://github.com/wazuh/wazuh/security/advisories/GHSA-ppc7-hj9v-vx39","label":"security-advisories@github.com"},{"url":"https://github.com/wazuh/wazuh/security/advisories/GHSA-ppc7-hj9v-vx39","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.00121,"epssPercentile":0.02154,"ingestedAt":"2026-09-08T21:11:12.286Z","slug":"CVE-2026-54084","body":"## Overview\n\nWazuh is an open-source security platform providing unified XDR and SIEM protection for endpoints and cloud workloads. In versions 4.0.0 through 4.14.6, a malicious or man-in-the-middle enrollment manager can crash a Wazuh agent during enrollment by returning a malformed key response with fewer than four fields, causing a NULL pointer dereference. The  w_enrollment_process_agent_key()  routine splits the manager-provided key into four space-separated fields but does not verify that all fields are present before passing them to validators. Because OS_StrBreak() leaves missing trailing entries as NULL and OS_IsValidName() calls strlen() on its argument without a NULL check, a response such as  OSSEC K:'1'  reaches OS_IsValidName(NULL) and terminates the agent process. Since Wazuh permits enrollment against an unverified manager when no CA certificate is configured, an attacker operating a rogue manager or intercepting the enrollment flow can deterministically crash agents, resulting in denial of service. This issue is fixed in version 4.14.7.\n\n## Affected\n\n- `wazuh >= 4.0.0, < 4.14.7`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `wazuh 4.14.7`","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}