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.
Published: 2026-04-21
Score: 8.2 High
EPSS: < 1% Very Low
KEV: No
Impact: Denial of Service
Action: Monitor
AI Analysis

Impact

Zervit's portable HTTP/web server fails to validate user input when a configuration reset request is processed. A remote attacker can send specially crafted requests that cause the server to stop responding, leading to a denial‑of‑service condition. Because the flaw only affects availability, confidentiality or integrity remain unchanged.

Affected Systems

The vulnerability affects Zervit’s portable HTTP/Web server. No specific product versions are listed, so any installation of the portable HTTP/Web server is potentially impacted.

Risk and Exploitability

The CVSS score of 8.2 indicates a high severity vulnerability. The EPSS score is below 1 %, implying a low likelihood of exploitation, and it is not yet listed in CISA’s KEV catalog. The attack requires remote access to the server, typically via an HTTP request to the configuration reset endpoint. The attacker can trigger a DoS by sending malformed or oversized input that bypasses the server’s validation logic.

Generated by OpenCVE AI on April 21, 2026 at 23:06 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply any vendor‑supplied patches or upgrade to a newer release of the portable HTTP/Web server where input validation of reset requests is fixed.
  • If a patch is unavailable, block or restrict access to the configuration reset endpoint using firewall rules or by disabling the feature on the production instance.
  • Monitor inbound traffic and logs for abnormal reset request patterns and schedule periodic application restarts to mitigate any transient service disruption.

Generated by OpenCVE AI on April 21, 2026 at 23:06 UTC.

Tracking

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Advisories

No advisories yet.

History

Wed, 22 Apr 2026 12:15:00 +0000

Type Values Removed Values Added
First Time appeared Zervit portable Http/web Server
Vendors & Products Zervit portable Http/web Server

Tue, 21 Apr 2026 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 21 Apr 2026 09:15:00 +0000

Type Values Removed Values Added
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.
Title Incorrect input validation on the Zervit portable HTTP/Web server
First Time appeared Zervit
Zervit portable Http Web Server
Weaknesses CWE-20
CPEs cpe:2.3:a:zervit:portable_http_web_server:0:*:*:*:*:*:*:*
Vendors & Products Zervit
Zervit portable Http Web Server
References
Metrics cvssV4_0

{'score': 8.2, 'vector': '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/AU:Y/R:U/V:D/RE:L'}

Subscriptions

Zervit Portable Http/web Server Portable Http Web Server
cve-icon MITRE

Status: PUBLISHED

Assigner: INCIBE

Published:

Updated: 2026-04-21T13:23:30.712Z

Reserved: 2025-12-01T14:33:41.665Z

Link: CVE-2025-13826

cve-icon Vulnrichment

Updated: 2026-04-21T13:23:23.370Z

cve-icon NVD

Status : Deferred

Published: 2026-04-21T09:16:06.087

Modified: 2026-06-17T08:34:50.203

Link: CVE-2025-13826

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-22T11:46:41Z

Weaknesses
  • CWE-20

    Improper Input Validation