# CVE-2026-112335: Wazuh Agent 1.0.0 before 4.14.9 Stack Buffer Overflow via read_snortfull

Status: published. Published: 2026-11-06. Updated: 2026-11-11.

Wazuh agent from 1.0.0 before 4.14.9 contains a stack-based buffer overflow in the logcollector snort-full log reader that miscalculates remaining buffer space in read_snortfull(). Attackers who write crafted multi-line content to a monitored snort-full log can overflow the 65,280-byte stack buffer, crashing the agent or overwriting an SEH handler on 32-bit Windows agents running as SYSTEM.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- wazuh / wazuh (wazuh/wazuh): ≥ 1.0.0; < 4.14.9 (affected, semver); 4.14.9 (unaffected, semver). Source: CNA: VulnCheck
-  / wazuh-agent (wazuh-agent): >= 1.0.0 (affected, GitHub advisory range). Source: GitHub GHSA-3gq8-gg8f-5h8h

## Severity and prioritization

- CVSS 4.0: 6.8 (medium); CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 5.5 (medium); CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H; source: CNA: VulnCheck

- CVSS 4.0: 6.8 (medium); CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X; source: NVD: disclosure@vulncheck.com

- CVSS 3.1: 5.5 (medium); CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H; source: NVD: disclosure@vulncheck.com

- CISA KEV: No listing in collected sources

- EPSS: 0.13% as of 2026-11-10; percentile 2.91%

- SSVC: exploitation poc; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-121

## Exploit evidence

- exploit: https://github.com/wazuh/wazuh/security/advisories/GHSA-3gq8-gg8f-5h8h (ADP: CISA-ADP)

## References

- https://github.com/wazuh/wazuh/security/advisories/GHSA-3gq8-gg8f-5h8h (CNA: VulnCheck; vendor-advisory)

- https://github.com/wazuh/wazuh/releases/tag/v4.14.9 (CNA: VulnCheck; release-notes)

- https://www.vulncheck.com/advisories/wazuh-agent-1.0.0-before-4.14.9-stack-buffer-overflow-via-read-snortfull (CNA: VulnCheck; third-party-advisory)

- https://github.com/wazuh/wazuh/security/advisories/GHSA-3gq8-gg8f-5h8h (ADP: CISA-ADP; exploit)

- https://github.com/wazuh/wazuh/releases/tag/v4.14.9 (disclosure@vulncheck.com)

- https://github.com/wazuh/wazuh/security/advisories/GHSA-3gq8-gg8f-5h8h (disclosure@vulncheck.com)

- https://www.vulncheck.com/advisories/wazuh-agent-1.0.0-before-4.14.9-stack-buffer-overflow-via-read-snortfull (disclosure@vulncheck.com)

- https://github.com/wazuh/wazuh/security/advisories/GHSA-3gq8-gg8f-5h8h (GitHub Security Advisories; advisory)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-112335; retrieved 2026-11-11; source updated 2026-11-11

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-112335; retrieved 2026-11-07; source updated 2026-11-06

- GitHub Security Advisories: https://github.com/wazuh/wazuh/security/advisories/GHSA-3gq8-gg8f-5h8h; retrieved 2026-11-08; source updated 2026-11-06

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-112335; retrieved 2026-11-11; source updated Not reported

Revision: d2f364f6ef64de1508b571cbc39f89e2371e2ef98581fe6deba89f9f3475c07e

Canonical: https://y2.dev/cve/CVE-2026-112335

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- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

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