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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "0"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "portable HTTP/Web server", "source": "cna", "vendor": "Zervit"}, "product": "portable_http/web_server", "vendor": "zervit"}], "analysis": {"en": {"generated_at": "2026-04-21T23:06:33.603228+00:00", "value": {"mitigation_remediation": ["Apply any vendor\u2011supplied 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."], "summary": {"action": "Monitor", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "The vulnerability affects Zervit\u2019s portable HTTP/Web server. No specific product versions are listed, so any installation of the portable HTTP/Web server is potentially impacted.", "description_and_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\u2011of\u2011service condition. Because the flaw only affects availability, confidentiality or integrity remain unchanged.", "risk_and_exploitability": "The CVSS score of 8.2 indicates a high severity vulnerability. The EPSS score is below 1\u202f%, implying a low likelihood of exploitation, and it is not yet listed in CISA\u2019s 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\u2019s validation logic."}}}}, "created": "2026-04-21T23:15:03.119153+00:00", "updated": "2026-04-22T11:46:41.572533+00:00", "vendors": ["zervit", "zervit$PRODUCT$portable_http/web_server"]}