Vulnerability Details CVE-2026-44254
Wazuh is a free and open source platform used for threat prevention, detection, and response. From 1.0.0 until 4.14.6 and 5.0.0-beta2, HandleSecureMessage() in src/remoted/secure.c passes a pointer inside its stack buffer to ReadSecMSG(), and src/os_crypto/shared/msgs.c decompresses up to OS_MAXSTR bytes at that offset. For an encrypted agent message on TCP port 1514 that expands to 65,536 bytes, os_zlib_uncompress() writes a terminating null byte beyond the end of the destination buffer. The resulting stack out-of-bounds write in the root-level remoted daemon can crash message processing and disrupt agent communications. This issue is fixed in versions 4.14.6 and 5.0.0-beta2.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 31.9%
CVSS Severity
CVSS v3 Score 5.3
Products affected by CVE-2026-44254
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cpe:2.3:a:wazuh:wazuh:1.0.0
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cpe:2.3:a:wazuh:wazuh:1.0.1
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cpe:2.3:a:wazuh:wazuh:1.0.2
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cpe:2.3:a:wazuh:wazuh:1.0.3
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cpe:2.3:a:wazuh:wazuh:1.0.4
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cpe:2.3:a:wazuh:wazuh:1.1
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cpe:2.3:a:wazuh:wazuh:1.1.0
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cpe:2.3:a:wazuh:wazuh:1.1.1
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cpe:2.3:a:wazuh:wazuh:2.0
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cpe:2.3:a:wazuh:wazuh:2.0.0
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cpe:2.3:a:wazuh:wazuh:2.0.1
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cpe:2.3:a:wazuh:wazuh:2.1.0
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cpe:2.3:a:wazuh:wazuh:2.1.1
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cpe:2.3:a:wazuh:wazuh:3.0.0
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cpe:2.3:a:wazuh:wazuh:3.1.0
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cpe:2.3:a:wazuh:wazuh:3.10.0
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cpe:2.3:a:wazuh:wazuh:3.10.1
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cpe:2.3:a:wazuh:wazuh:3.10.2
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cpe:2.3:a:wazuh:wazuh:3.11.0
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cpe:2.3:a:wazuh:wazuh:3.11.1
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cpe:2.3:a:wazuh:wazuh:3.11.2
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cpe:2.3:a:wazuh:wazuh:3.11.3
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cpe:2.3:a:wazuh:wazuh:3.11.4
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cpe:2.3:a:wazuh:wazuh:3.11.5
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cpe:2.3:a:wazuh:wazuh:3.12.0
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cpe:2.3:a:wazuh:wazuh:3.12.1
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cpe:2.3:a:wazuh:wazuh:3.12.2
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cpe:2.3:a:wazuh:wazuh:3.12.3
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cpe:2.3:a:wazuh:wazuh:3.13.0
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cpe:2.3:a:wazuh:wazuh:3.13.1
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cpe:2.3:a:wazuh:wazuh:3.13.2
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cpe:2.3:a:wazuh:wazuh:3.13.3
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cpe:2.3:a:wazuh:wazuh:3.13.4
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cpe:2.3:a:wazuh:wazuh:3.13.5
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cpe:2.3:a:wazuh:wazuh:3.13.6
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cpe:2.3:a:wazuh:wazuh:3.2.0
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cpe:2.3:a:wazuh:wazuh:3.2.1
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cpe:2.3:a:wazuh:wazuh:3.2.2
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cpe:2.3:a:wazuh:wazuh:3.2.3
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cpe:2.3:a:wazuh:wazuh:3.2.4
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cpe:2.3:a:wazuh:wazuh:3.3.0
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cpe:2.3:a:wazuh:wazuh:3.3.1
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cpe:2.3:a:wazuh:wazuh:3.4.0
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cpe:2.3:a:wazuh:wazuh:3.5.0
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cpe:2.3:a:wazuh:wazuh:3.6.0
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cpe:2.3:a:wazuh:wazuh:3.6.1
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cpe:2.3:a:wazuh:wazuh:3.7.0
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cpe:2.3:a:wazuh:wazuh:3.7.1
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cpe:2.3:a:wazuh:wazuh:3.7.2
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cpe:2.3:a:wazuh:wazuh:3.8.0
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cpe:2.3:a:wazuh:wazuh:3.8.1
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cpe:2.3:a:wazuh:wazuh:3.8.2
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cpe:2.3:a:wazuh:wazuh:3.9.0
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cpe:2.3:a:wazuh:wazuh:3.9.1
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cpe:2.3:a:wazuh:wazuh:3.9.2
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cpe:2.3:a:wazuh:wazuh:3.9.3
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cpe:2.3:a:wazuh:wazuh:3.9.4
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cpe:2.3:a:wazuh:wazuh:3.9.5
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cpe:2.3:a:wazuh:wazuh:4.0.0
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cpe:2.3:a:wazuh:wazuh:4.0.1
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cpe:2.3:a:wazuh:wazuh:4.0.2
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cpe:2.3:a:wazuh:wazuh:4.0.3
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cpe:2.3:a:wazuh:wazuh:4.0.4
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cpe:2.3:a:wazuh:wazuh:4.1.0
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cpe:2.3:a:wazuh:wazuh:4.1.1
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cpe:2.3:a:wazuh:wazuh:4.1.2
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cpe:2.3:a:wazuh:wazuh:4.1.3
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cpe:2.3:a:wazuh:wazuh:4.1.4
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cpe:2.3:a:wazuh:wazuh:4.1.5
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cpe:2.3:a:wazuh:wazuh:4.10.0
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cpe:2.3:a:wazuh:wazuh:4.10.1
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cpe:2.3:a:wazuh:wazuh:4.10.2
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cpe:2.3:a:wazuh:wazuh:4.10.3
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cpe:2.3:a:wazuh:wazuh:4.10.4
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cpe:2.3:a:wazuh:wazuh:4.10.5
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cpe:2.3:a:wazuh:wazuh:4.11.0
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cpe:2.3:a:wazuh:wazuh:4.11.1
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cpe:2.3:a:wazuh:wazuh:4.11.2
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cpe:2.3:a:wazuh:wazuh:4.12.0
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cpe:2.3:a:wazuh:wazuh:4.13.0
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cpe:2.3:a:wazuh:wazuh:4.13.1
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cpe:2.3:a:wazuh:wazuh:4.14.0
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cpe:2.3:a:wazuh:wazuh:4.14.1
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cpe:2.3:a:wazuh:wazuh:4.14.2
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cpe:2.3:a:wazuh:wazuh:4.14.3
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cpe:2.3:a:wazuh:wazuh:4.14.4
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cpe:2.3:a:wazuh:wazuh:4.14.5
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cpe:2.3:a:wazuh:wazuh:4.2.0
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cpe:2.3:a:wazuh:wazuh:4.2.1
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cpe:2.3:a:wazuh:wazuh:4.2.2
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cpe:2.3:a:wazuh:wazuh:4.2.3
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cpe:2.3:a:wazuh:wazuh:4.2.4
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cpe:2.3:a:wazuh:wazuh:4.2.5
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cpe:2.3:a:wazuh:wazuh:4.2.6
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cpe:2.3:a:wazuh:wazuh:4.2.7
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cpe:2.3:a:wazuh:wazuh:4.3.0
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cpe:2.3:a:wazuh:wazuh:4.3.1
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cpe:2.3:a:wazuh:wazuh:4.3.10
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cpe:2.3:a:wazuh:wazuh:4.3.11
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cpe:2.3:a:wazuh:wazuh:4.3.2
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cpe:2.3:a:wazuh:wazuh:4.3.3
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cpe:2.3:a:wazuh:wazuh:4.3.4
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cpe:2.3:a:wazuh:wazuh:4.3.5
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cpe:2.3:a:wazuh:wazuh:4.3.6
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cpe:2.3:a:wazuh:wazuh:4.3.7
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cpe:2.3:a:wazuh:wazuh:4.3.8
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cpe:2.3:a:wazuh:wazuh:4.3.9
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cpe:2.3:a:wazuh:wazuh:4.4.0
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cpe:2.3:a:wazuh:wazuh:4.4.1
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cpe:2.3:a:wazuh:wazuh:4.4.2
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cpe:2.3:a:wazuh:wazuh:4.4.3
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cpe:2.3:a:wazuh:wazuh:4.4.4
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cpe:2.3:a:wazuh:wazuh:4.4.5
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cpe:2.3:a:wazuh:wazuh:4.5.0
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cpe:2.3:a:wazuh:wazuh:4.5.1
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cpe:2.3:a:wazuh:wazuh:4.5.2
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cpe:2.3:a:wazuh:wazuh:4.5.3
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cpe:2.3:a:wazuh:wazuh:4.5.4
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cpe:2.3:a:wazuh:wazuh:4.6.0
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cpe:2.3:a:wazuh:wazuh:4.7.0
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cpe:2.3:a:wazuh:wazuh:4.7.1
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cpe:2.3:a:wazuh:wazuh:4.7.2
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cpe:2.3:a:wazuh:wazuh:4.7.3
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cpe:2.3:a:wazuh:wazuh:4.7.4
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cpe:2.3:a:wazuh:wazuh:4.7.5
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cpe:2.3:a:wazuh:wazuh:4.8.0
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cpe:2.3:a:wazuh:wazuh:4.8.1
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cpe:2.3:a:wazuh:wazuh:4.8.2
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cpe:2.3:a:wazuh:wazuh:4.9.0
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cpe:2.3:a:wazuh:wazuh:4.9.1
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cpe:2.3:a:wazuh:wazuh:4.9.2
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cpe:2.3:a:wazuh:wazuh:5.0.0