Agent crash via malformed enrollment key response
Published Aug 27, 2026 · Updated Aug 27, 2026
NULL pointer dereference in Wazuh Agent 4.0.0 through 4.14.6 allows man-in-the-middle attackers to crash the agent during enrollment. The w_enrollment_process_agent_key() routine accepts fewer than four fields from OS_StrBreak() and passes a missing name to OS_IsValidName(), which calls strlen() on NULL. Exploitation requires a rogue manager or interception of enrollment, particularly when manager CA verification is not configured, and interrupts the affected agent process.
Summary
What happened
NULL pointer dereference in Wazuh Agent 4.0.0 through 4.14.6 allows man-in-the-middle attackers to crash the agent during enrollment. The w_enrollment_process_agent_key() routine accepts fewer than four fields from OS_StrBreak() and passes a missing name to OS_IsValidName(), which calls strlen() on NULL. Exploitation requires a rogue manager or interception of enrollment, particularly when manager CA verification is not configured, and interrupts the affected agent process.
The record
- CVE
- CVE-2026-54084
- Published
- Aug 27, 2026
- Updated
- Aug 27, 2026
- Vendor
- Wazuh
- Product
- Wazuh
- Classifications
- CWE-476, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 27, 2026CVE publishedPublication date reported by the CVE source.
- Aug 27, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=>= 4.0.0, < 4.14.7
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Malformed enrollment key response reproducerproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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