Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-54084

CVE-2026-54084MEDIUM

Wazuh agent enrollment NULL pointer dereference via malformed manager response

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   H   N   R  U  N  N  H    5.3   .0020    8.5     —

AFFECTED
  Product  Versions              Fixed
  wazuh    >= 4.0.0, < 4.14.7 –  —

TIMELINE
  Jun 11  Reserved by GitHub_M
  Aug 27  Published (CNA: GitHub_M)
  Sep 15  EXPLOIT PUBLISHED — CVE-2026-54084 (wazuh). Public exploit reference added.

CWE-476 · CNA: GitHub_M · CVSS v3.1 · 2 references · NVD status: Analyzed

Description

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 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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
June 11, 2026	Reserved	Reserved by GitHub_M
August 27, 2026	Published	Published (CNA: GitHub_M)
September 15, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-54084 (wazuh). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
wazuh	wazuh	—	>= 4.0.0, < 4.14.7	—

Weaknesses

CWE-476

References (2)

https://github.com/wazuh/wazuh/commit/7dfbb4a292bc6ae8e3bb4c1982f687f35216a748 [Patch]
https://github.com/wazuh/wazuh/security/advisories/GHSA-ppc7-hj9v-vx39 [Exploit, Vendor Advisory]

Authoritative record: CVE-2026-54084 at cve.org

Vendors: wazuh

Weaknesses: CWE-476

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-54084 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.