CVE-2026-40106
- Source
- https://cve.org/CVERecord?id=CVE-2026-40106
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40106.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-40106
- Aliases
-
- GHSA-qvrc-pcfc-jhqc
- Published
- 2026-07-16T23:57:16Z
- Modified
- 2026-10-28T02:30:51Z
- Severity
-
- 4.7 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- Wazuh: Heap-based Buffer Overflow in syscheck Registry Wildcard Expansion (LPE / DoS)
- Details
-
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.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-122" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40106.json" }- References
Affected packages
Git / github.com/wazuh/wazuh
Affected ranges
- Type
- GIT
- Repo
- https://github.com/wazuh/wazuh
- Events
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "4.6.0" }, { "fixed": "4.14.5" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "cpe": "cpe:2.3:a:wazuh:wazuh:*:*:*:*:*:*:*:*", "range": [ { "introduced": "4.6.0" }, { "fixed": "4.14.5" } ], "source": "CPE_RANGE" } ] }