---
id: CVE-2023-7340
title: Wazuh authd service (os_auth) Heap-based Buffer Overflow
summary: >-
  Wazuh authd contains a heap-buffer overflow vulnerability that allows
  attackers to cause memory corruption and malformed heap data by sending
  specially crafted input. Attackers can exploit this vulnerability to trigger a
  denial of servic…
severity: low
cvss: 3.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L'
cvssSource: cna
cwe:
  - CWE-125
vendor: Wazuh
product: os_auth
affected:
  - os_auth >= 3.5.0 <= 4.3.10
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-03-27T16:55:39.979053Z'
exploitAvailable: true
published: '2026-03-27'
updated: '2026-11-08'
sourceUpdated: '2026-11-08T13:59:48.135Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2023-7340'
references:
  - url: 'https://github.com/wazuh/wazuh/security/advisories/GHSA-grjq-p5fg-m24r'
    label: GitHub Security Advisory (GHSA-grjq-p5fg-m24r)
  - url: 'https://www.vulncheck.com/advisories/heap-buffer-overflow-in-wazuh-authd'
tags:
  - cve.org
  - exploit-available
epss: 0.00329
epssPercentile: 0.26189
ingestedAt: '2026-11-08T14:51:22.490Z'
---

## Overview

Wazuh authd contains a heap-buffer overflow vulnerability that allows attackers to cause memory corruption and malformed heap data by sending specially crafted input. Attackers can exploit this vulnerability to trigger a denial of service condition, resulting in low availability impact to the authentication daemon.

## Affected

- `os_auth >= 3.5.0 <= 4.3.10`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.