Improper Input Validation (RCE)

published 2021-03-06 5y ago modified 2026-06-17 4mo ago also GHSA-w36g-q975-37rg , EUVD-2021-0716

cvss: 8.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 8.7%; EPSS 8.7% chance of exploitation in 30 days, percentile 95%
public exploits: 0; none known

Wazuh API in Wazuh from 4.0.0 to 4.0.3 allows authenticated users to execute arbitrary code with administrative privileges via /manager/files URI. An authenticated user to the service may exploit incomplete input validation on the /manager/files API to inject arbitrary code within the API service script.

Patch / fix

fixed in 1 links 1

npm wazuh 4.0.4

github.com/wazuh/wazuh/releases/tag/v4.0.4 release

Is CVE-2021-26814 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Exploit prediction

8.75% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	6.5	AV:N/AC:L/Au:S/C:P/I:P/A:P
GitHub	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
npm	wazuh	>=4.0.0, <4.0.4	4.0.4

Classification

Weakness

CWE-22 Improper Limitation of a Pathname to a Restricted Directory
CWE-20 Improper Input Validation

References

documentation.wazuh.com /4.0/release-notes/release_4_0_4.html
web, release-notes, vendor-advisory
github.com /wazuh/wazuh/releases/tag/v4.0.4
web, release-notes, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2021-26814
advisory

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.