Medium severity · published Mar 27, 2026
CVE-2023-7340
Wazuh authd service (os_auth) Heap-based Buffer Overflow
4.3
CVSS
0.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 26% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WA
Wazuh · Wazuh
3.5.0 through 4.3.10 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-7340
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-7340
Exploit
https://github.com/wazuh/wazuh/security/advisories/GHSA-grjq-p5fg-m24r
Third Party Advisory
https://www.vulncheck.com/advisories/heap-buffer-overflow-in-wazuh-authd
More from Wazuh
9.9
CVE-2025-24016
Remote code execution in Wazuh server
9.9
CVE-2026-30893
Wazuh cluster sync path traversal in decompress_files() enables arbitrary file write and code execution from authenticated cluster peer
9.8
CVE-2024-32038
Wazuh is a free and open source platform used for threat prevention, detection, and response
9.8
CVE-2021-44079
In the wazuh-slack active response script in Wazuh 4.2.x before 4.2.5, untrusted user agents are passed to a curl command line, potentially resulting in remote code execution
9.3
CVE-2026-67308
Wazuh GitHub Actions Shell Injection via Fork Pull Request