← Vulnerability feed

Vulnerability record · CVE-2020-18077 · published 17 December 2021

CVE-2020-18077: Ftpshell server classic buffer overflow vulnerability

Ftpshell · Ftpshell Server

A buffer overflow vulnerability in the Virtual Path Mapping component of FTPShell v6.83 allows attackers to cause a denial of service (DoS).

7.5 CVSS 3.1 High EPSS 1.2% · top 34.3% CWE-120 · Classic buffer overflow
7.5CVSS 3.1 base score, v2 5.0
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A buffer overflow vulnerability in the Virtual Path Mapping component of FTPShell v6.83 allows attackers to cause a denial of service (DoS).

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://github.com/cve-vul/vul/blob/master/FTPShell/FTPShell_Server_6.83_DOS.md ExploitThird Party Advisory
https://github.com/cve-vul/vul/blob/master/FTPShell/FTPShell_Server_6.83_DOS.md ExploitThird Party Advisory

Track CVE-2020-18077 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

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

9.3CVE-2009-0349Ftpshell server memory buffer overflow vulnerabilityStack-based buffer overflow in FTPShell Server 4.3 allows user-assisted remote attackers to cause a denial of service (persistent daemon crash) and p…EPSS 5.9%8.6CVE-2019-25619Ftpshell server out-of-bounds write vulnerabilityFTP Shell Server 6.83 contains a buffer overflow vulnerability in the 'Account name to ban' field that allows local attackers to execute arbitrary co…EPSS 0.21%6.9CVE-2018-25226Ftpshell server out-of-bounds write vulnerabilityFTPShell Server 6.83 contains a buffer overflow vulnerability that allows local attackers to crash the application by supplying an excessively long s…EPSS 0.22%2.1CVE-2005-2426Ftpshell server vulnerabilityFTPshell Server 3.38 allows remote authenticated users to cause a denial of service (application crash) by multiple connections and disconnections wi…EPSS 1.4%5.5CVE-2025-43520Apple OS kernel memory corruption via malicious appA memory corruption flaw (classic buffer overflow) in Apple's kernel was fixed across iOS, iPadOS, macOS, tvOS, visionOS and watchOS. A malicious app…KEVEPSS 0.43%analysed8.8CVE-2025-31277Apple WebKit memory corruption via malicious web contentApple WebKit fails to handle memory correctly when processing crafted web content, leading to memory corruption across Safari, iOS, iPadOS, macOS, tv…KEVEPSS 1.6%analysed9.8CVE-2022-37055D-Link Go-RT-AC750 router buffer overflow in cgibin hnap_mainD-Link Go-RT-AC750 firmware revisions A v101b03 and B v200b02 contain a classic buffer overflow reachable through the cgibin hnap_main handler. The f…KEVEPSS 56%analysed9.9CVE-2025-20333Cisco ASA and FTD VPN web server buffer overflow allows root RCECisco Secure Firewall ASA and FTD Software fail to properly validate user-supplied input in HTTP(S) requests to the VPN web server, causing a classic…KEVEPSS 71%analysed

Source: NIST National Vulnerability Database (record CVE-2020-18077), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.