Vulnerability · CVE-2026-25790
Wazuh is a free and open source platform used for threat prevention, detection, and response.
Published Mar 17, 2026 · corrected/updated Jun 17, 2026 · wazuh wazuh · evidence confidence high
Wazuh is a free and open source platform used for threat prevention, detection, and response. Starting in version 3.9.0 and prior to version 4.14.3, multiple stack-based buffer overflows exist in the Security Configuration Assessment (SCA) decoder ( ). The use of with a floating-point ( ) format specifier on a fixed-size 128-byte buffer allows a remote attacker to overflow the stack. A specially crafted JSON event can trigger this overflow, leading to a denial of service (crash) or potential RCE on the Wazuh manager. The vulnerability is located in , within the and functions. In multiple locations, a 128-byte buffer ( ) is allocated on the stack to hold the string representation of a number from a JSON event. The code checks if the number is an integer or a double. If it's a double, it uses to perform the conversion. This call is unbounded. If a floating-point number with a large exponent (e.g., ) is provided, will attempt to write its full string representation (a "1" followed by 150 zeros), which is larger than the 128-byte buffer, corrupting the stack. Version 4.14.3 patches the issue.
Grounded briefings
Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.
Executive
CVE-2026-25790 is a high public vulnerability record for wazuh wazuh. It is not currently listed in the CISA Known Exploited catalog. Check the linked vendor or CERT advisories for patch status. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.
System administrator
Identify whether wazuh wazuh is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: wazuh/wazuh. Check the linked vendor or CERT advisories for patch status. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.
Security analyst
Signals on file: CVSS 7.2, EPSS 0.6%. It is not currently listed in the CISA Known Exploited catalog. Weakness classes: CWE-121, CWE-787. Sources contributing to this record: cve_org, epss, nvd. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.
Exploitation and remediation
Exploitation evidence
Not listed as known exploited in CISA KEV. Not in CISA KEV or VulnCheck KEV.
Patch and remediation
No required-action text is stored yet. Use the vendor or CERT links in Sources for patch availability.
Safe detection guidance
Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Mar 17, 2026 · NIST NVD
Detected
Wazuh is a free and open source platform used for threat prevention, detection, and response. Starting in version 3.9.0 and prior to version 4.14.3, multiple stack-based buffer overflows exist in the Security Configuration Assessment (SCA) decoder ( ). The use of with a floating-point ( ) format specifier on a fixed-size 128-byte buffer allows a remote attacker to overflow the stack. A specially c
Jun 17, 2026 · NIST NVD
Updated
Wazuh is a free and open source platform used for threat prevention, detection, and response. Starting in version 3.9.0 and prior to version 4.14.3, multiple stack-based buffer overflows exist in the Security Configuration Assessment (SCA) decoder ( ). The use of with a floating-point ( ) format specifier on a fixed-size 128-byte buffer allows a remote attacker to overflow the stack. A specially c
Affected
- cpe wazuh/wazuhversion unspecified
Sources
- CVE.orgVulnerability recordCVE-2026-25790
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-25790
30-day exploitation probability 0.6%
first.org - NIST NVDVulnerability recordCVE-2026-25790
Wazuh is a free and open source platform used for threat prevention, detection, and response. Starting in version 3.9.0 and prior to version 4.14.3, multiple stack-based buffer overflows exist in the Security Configuration Assessment (SCA) decoder ( ). The use of
nvd.nist.gov