Vulnerability record · CVE-2021-4433 · published 18 January 2024

CVE-2021-4433: Karjasoft sami http server improper resource shutdown vulnerability

KKarjasoft · Sami Http Server

A vulnerability was found in Karjasoft Sami HTTP Server 2.0. It has been classified as problematic. Affected is an unknown function of the component HTTP HEAD Rrequest Handler. The manipulation leads to denial of service. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-250836.

7.5 CVSS 3.1 High EPSS 1.3% · top 31.6% CWE-404 · Improper resource shutdown

7.5CVSS 3.1 base score, v2 5.0

1.3%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

6References, 2 tagged exploit

17 Jun 2026Last modified by NVD

Description

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

KSami Http Server Karjasoft

References

Link	Tags
https://packetstormsecurity.com/files/163138/Sami-HTTP-Server-2.0-Denial-Of-Service.html	ExploitThird Party AdvisoryVDB Entry
https://vuldb.com/?ctiid.250836	Permissions RequiredThird Party Advisory
https://vuldb.com/?id.250836	Third Party Advisory
https://packetstormsecurity.com/files/163138/Sami-HTTP-Server-2.0-Denial-Of-Service.html	ExploitThird Party AdvisoryVDB Entry
https://vuldb.com/?ctiid.250836	Permissions RequiredThird Party Advisory
https://vuldb.com/?id.250836	Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-4433), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.