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Vulnerabilities

Vulnerability · CVE-2026-25790

Wazuh is a free and open source platform used for threat prevention, detection, and response.

Published Mar 17, 2026 · catalog updated Jun 17, 2026 · Wazuh is a free

Check if you run it

No confirmed exploitation is on record for CVE-2026-25790. EPSS is 0.60%. Act only if a listed version of Wazuh is a free is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Wazuh is a free).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.2
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.60%
Remediation
Advisory link
Affected products
cpe wazuh/wazuh

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe wazuh/wazuhversion unspecified

How to fix CVE-2026-25790

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-25790. EPSS is 0.60%. Act only if a listed version of Wazuh is a free is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-121: Stack-based Buffer Overflow; CWE-787: Out-of-bounds Write. EPSS 0.60%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

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.

  1. 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

  2. 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

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

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.