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Vulnerability record · CVE-2025-13826 · published 21 April 2026

CVE-2025-13826: Improper input validation vulnerability

Zervit's portable HTTP/web server is vulnerable to remote DoS attacks when a configuration reset request is made. The vulnerability is caused by inadequate validation of user-supplied input. An attacker can exploit this vulnerability by sending malicious requests. If the vulnerability is successfully exploited, the application can be made to stop responding, resulting in a DoS condition. It is possible to manually restart the application.

8.2 CVSS 4.0 High EPSS 0.25% · top 84.9% CWE-20 · Improper input validation Deferred
8.2CVSS 4.0 base score
0.25%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

Description

Zervit's portable HTTP/web server is vulnerable to remote DoS attacks when a configuration reset request is made. The vulnerability is caused by inadequate validation of user-supplied input. An attacker can exploit this vulnerability by sending malicious requests. If the vulnerability is successfully exploited, the application can be made to stop responding, resulting in a DoS condition. It is possible to manually restart the application.

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:

References

LinkTags
https://www.incibe.es/en/incibe-cert/notices/aviso/incorrect-input-validation-zervit-portable-httpweb-server

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Source: NIST National Vulnerability Database (record CVE-2025-13826), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.