CVE-2023-7340: Wazuh authd service (os_auth) Heap-based Buffer Overflow

Published Mar 27, 2026
·
Updated

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 Software

3 affected components
Wazuh Wazuh authd (os_auth)
Wazuh Wazuh<=3.5.0
Wazuh Wazuh=4.3.10

Event History

Mar 27, 2026
CVE Published
via MITRE·03:52 PM
Data Sourced
via MITRE·03:52 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·04:16 PM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2023-7340?

CVE-2023-7340 has a high severity due to its potential for memory corruption and denial of service.

2

How do I fix CVE-2023-7340?

To fix CVE-2023-7340, you should update the Wazuh authd software to the latest version that contains the patch.

3

What type of vulnerability is CVE-2023-7340?

CVE-2023-7340 is classified as a heap buffer overflow vulnerability.

4

Who is affected by CVE-2023-7340?

CVE-2023-7340 affects users of Wazuh authd if they are using a version that has not been patched.

5

What can attackers do with CVE-2023-7340?

Attackers can exploit CVE-2023-7340 to cause denial of service by sending specially crafted input that triggers memory corruption.

Contact

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