CVE-2020-36964 | YATinyWinFTP contains a denial of service vulnerability that… | CVSS 9.8 CRITICAL

Description

YATinyWinFTP contains a denial of service vulnerability that allows attackers to crash the FTP service by sending a 272-byte buffer with a trailing space. Attackers can exploit the service by connecting and sending a malformed command that triggers a buffer overflow and service crash.

Metadata

CVE ID: CVE-2020-36964
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-01-27 15:47 UTC
Published: 2026-01-28 17:35 UTC
Last updated: 2026-01-29 18:12 UTC
Primary CWE: CWE-787
Out-of-bounds Write
Vendor / Product: ik80 / YATinyWinFTP
Sources: cve.org · NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: yes
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
ik80	YATinyWinFTP	—	0.0.5

Weakness (CWE)

CWE	Source	Description
CWE-787	cna	Out-of-bounds Write

CVSS scores (2)

Score	Severity	Version	Source	Vector
9.8	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.7	HIGH	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

References (3)

ExploitDB-49127 https://www.exploit-db.com/exploits/49127
YATinyWinFTP GitHub Repository https://github.com/ik80/YATinyWinFTP
VulnCheck Advisory: YATinyWinFTP - Denial of Service https://www.vulncheck.com/advisories/yatinywinftp-denial-of-service