Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV L L L N U H H H 7.8 .0013 2.9 —
AFFECTED Product Versions Fixed wazuh >= 4.6.0, < 4.14.5 – —
TIMELINE Apr 9 Reserved by GitHub_M Jul 16 EXPLOIT PUBLISHED — CVE-2026-40106 (wazuh). Public exploit reference added. Jul 16 Published (CNA: GitHub_M)
Wazuh is a free and open source platform used for threat prevention, detection, and response. Versions 4.6.0 and above prior to 4.14.5 contain a heap-based buffer overflow vulnerability in the syscheck component of the Wazuh agent for Windows. When expanding registry paths containing wildcards (* or ?), the agent allocates a fixed-size heap buffer of 256 bytes (OS_SIZE_256). By creating a registry subkey with a maximum allowed length (255 characters) inside a monitored path, a low-privileged local attacker can force an out-of-bounds write during string concatenation. Since wazuh-agent.exe runs as NT AUTHORITY\SYSTEM, this can lead to a silent Denial of Service (blinding the agent) or potentially Local Privilege Escalation (LPE). This issue has been fixed in version 4.14.5.
| Date | Event | Detail |
|---|---|---|
| April 9, 2026 | Reserved | Reserved by GitHub_M |
| July 16, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-40106 (wazuh). Public exploit reference added. |
| July 16, 2026 | Published | Published (CNA: GitHub_M) |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| wazuh | wazuh | — | >= 4.6.0, < 4.14.5 | — |
Authoritative record: CVE-2026-40106 at cve.org
Vendors: wazuh
Weaknesses: CWE-122
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-40106 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 Wednesday, August 19, 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.