{"identifier":"CVE-2026-44254","cve":{"id":"CVE-2026-44254","description":"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.","published":"2026-08-19T16:17:10.967000+00:00","modified":"2026-10-27T11:10:00.193000+00:00","status":"Analyzed","score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","cvss_version":"3.1","affected":[{"criteria":"cpe:2.3:a:wazuh:wazuh:*:*:*:*:*:*:*:*","versionStartIncluding":"1.0.0","versionStartExcluding":"","versionEndIncluding":"","versionEndExcluding":"4.14.6"},{"criteria":"cpe:2.3:a:wazuh:wazuh:5.0.0:beta1:*:*:*:*:*:*","versionStartIncluding":"","versionStartExcluding":"","versionEndIncluding":"","versionEndExcluding":""}],"weaknesses":["CWE-131","CWE-787"],"references":[{"url":"https://github.com/wazuh/wazuh/commit/96772487fbdecd43cc83e284ee7aeb45e3cfcd96","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/wazuh/wazuh/pull/35773","source":"security-advisories@github.com","tags":["Issue Tracking","Patch"]},{"url":"https://github.com/wazuh/wazuh/releases/tag/v4.14.6","source":"security-advisories@github.com","tags":["Release Notes"]},{"url":"https://github.com/wazuh/wazuh/releases/tag/v5.0.0-beta2","source":"security-advisories@github.com","tags":["Release Notes"]},{"url":"https://github.com/wazuh/wazuh/security/advisories/GHSA-9wm4-fp6c-hqgq","source":"security-advisories@github.com","tags":["Exploit","Vendor Advisory"]}],"kev":null,"kev_checked":true,"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.6,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-08-19T18:03:36.678329Z","id":"CVE-2026-44254","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:wazuh:wazuh:*:*:*:*:*:*:*:*","versionStartIncluding":"1.0.0","versionEndExcluding":"4.14.6","matchCriteriaId":"48D41B6B-16D4-46DD-8349-7C4F82D78C2E"},{"vulnerable":true,"criteria":"cpe:2.3:a:wazuh:wazuh:5.0.0:beta1:*:*:*:*:*:*","matchCriteriaId":"007B01AA-AED0-4E92-8999-07E74B630460"}]}]}],"source":"nvd","retrieved_at":"2026-10-28T10:25:53.234786+00:00","exploited":false,"kev_stale":false,"products":["wazuh / wazuh"],"priority":{"label":"Assess exposure and vendor guidance","reasons":["No higher-priority signal is available in the current stored evidence."]},"epss":{"probability":0.00497,"percentile":0.42578,"date":"2026-10-29","stale":false},"version_assessment":null},"news":[],"campaigns":[],"domains":[{"domain":"github.com","source_url":"https://github.com/wazuh/wazuh/commit/96772487fbdecd43cc83e284ee7aeb45e3cfcd96","investigate_url":"https://investigate.aeglixmind.com/#github.com"}],"arsenal_url":"https://arsenal.aeglixmind.com/?cve=CVE-2026-44254","catalog_url":"https://cves.aeglixmind.com/cve/CVE-2026-44254","research_url":"https://investigate.aeglixmind.com/research/cve/CVE-2026-44254","coverage":{"news_candidates_checked":0,"campaign_candidates_checked":0,"bounded":false,"notice":"Exact CVE mentions in stored public excerpts and reviewed campaign content only. A mention is not proof of exploitation, attribution or tool suitability. Missing matches do not establish absence."}}