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Vulnerability record · CVE-2021-4432 · published 16 January 2024

CVE-2021-4432: Pcman ftp server improper resource shutdown vulnerability

Pcman · Ftp Server

A vulnerability was found in PCMan FTP Server 2.0.7. It has been classified as problematic. This affects an unknown part of the component USER Command Handler. The manipulation leads to denial of service. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-250719.

7.5 CVSS 3.1 High EPSS 1.3% · top 30.3% 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
8References, 4 tagged exploit
19 Aug 2026Last modified by NVD

Description

A vulnerability was found in PCMan FTP Server 2.0.7. It has been classified as problematic. This affects an unknown part of the component USER Command Handler. The manipulation leads to denial of service. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-250719.

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.

References

LinkTags
https://0day.today/exploit/description/36412 ExploitThird Party Advisory
https://packetstormsecurity.com/files/163104/PCMan-FTP-Server-2.0.7-Denial-Of-Service.html ExploitThird Party AdvisoryVDB Entry
https://vuldb.com/?ctiid.250719 Permissions RequiredThird Party Advisory
https://vuldb.com/?id.250719 Third Party Advisory
https://0day.today/exploit/description/36412 ExploitThird Party Advisory
https://packetstormsecurity.com/files/163104/PCMan-FTP-Server-2.0.7-Denial-Of-Service.html ExploitThird Party AdvisoryVDB Entry
https://vuldb.com/?ctiid.250719 Permissions RequiredThird Party Advisory
https://vuldb.com/?id.250719 Third Party Advisory

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Related vulnerabilities

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

10.0CVE-2013-4730PCMan's FTP Server USER command buffer overflow allows remote code executionPCMan's FTP Server 2.0.7 contains a buffer overflow in its handling of the USER command, triggered by a long string. A remote attacker can send an ov…EPSS 66%analysed9.8CVE-2018-18861Pcman ftp server memory buffer overflow vulnerabilityBuffer overflow in PCMan FTP Server 2.0.7 allows for remote code execution via the APPE command.EPSS 4.5%7.8CVE-2015-7601PCMan FTP Server directory traversal in RETR commandPCMan's FTP Server 2.0.7 contains a directory traversal flaw in its handling of the RETR command. A remote attacker can supply a ..// sequence to esc…EPSS 58%analysed7.5CVE-2024-0731Pcman ftp server improper resource shutdown vulnerabilityA vulnerability has been found in PCMan FTP Server 2.0.7 and classified as problematic. This vulnerability affects unknown code of the component PUT …EPSS 1.1%7.5CVE-2024-0732Pcman ftp server improper resource shutdown vulnerabilityA vulnerability was found in PCMan FTP Server 2.0.7 and classified as problematic. This issue affects some unknown processing of the component STOR C…EPSS 1.1%6.9CVE-2025-5636Pcman ftp server memory buffer overflow vulnerabilityA vulnerability, which was classified as critical, has been found in PCMan FTP Server 2.0.7. This issue affects some unknown processing of the compon…EPSS 0.67%6.9CVE-2025-5637Pcman ftp server memory buffer overflow vulnerabilityA vulnerability, which was classified as critical, was found in PCMan FTP Server 2.0.7. Affected is an unknown function of the component SYSTEM Comma…EPSS 0.67%6.9CVE-2025-5635Pcman ftp server memory buffer overflow vulnerabilityA vulnerability classified as critical was found in PCMan FTP Server 2.0.7. This vulnerability affects unknown code of the component PLS Command Hand…EPSS 0.71%

Source: NIST National Vulnerability Database (record CVE-2021-4432), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.