CVE-2026-5789: civetweb (CVSS 7.8)

Description

Vulnerability related to an unquoted search path in CivetWeb v1.16. This vulnerability allows a local attacker to execute arbitrary code with elevated privileges by placing a malicious executable in a directory that is scanned before the intended application path (C:\Program Files\CivetWeb\CivetWeb.exe --), due to the absence of quotes in the service configuration.

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CVSS v3.1 Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0002

Probability of exploitation

0.03%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-428 CWE-428

Affected Products

Vendor	Product	Versions
civetweb_project	civetweb	All

References

Other References

https://www.incibe.es/en/incibe-cert/notices/aviso/search-path-without-quotes-civetweb

Frequently Asked Questions

What is CVE-2026-5789? +

Vulnerability related to an unquoted search path in CivetWeb v1.16. This vulnerability allows a local attacker to execute arbitrary code with elevated privileges by placing a malicious executable in a directory that is scanned before the intended application path (C:\Program Files\CivetWeb\CivetWeb.exe --), due to the absence of quotes in the service configuration. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-5789? +

CVE-2026-5789 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0002, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-5789? +

CVE-2026-5789 affects products from civetweb_project, specifically: civetweb. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-5789? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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