CVE-2020-37166 MEDIUM

CVE-2020-37166: AbsoluteTelnet 11.12 - 'SSH2/username' Denial of Service

Vendor Celestial Software
Product AbsoluteTelnet
Weakness CWE-120
Published February 6, 2026
Last update February 17, 2026
View on NVD All CVEs

CVSS base score

6.9/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

AbsoluteTelnet 11.12 contains a denial of service vulnerability in the SSH2 username input field that allows local attackers to crash the application. Attackers can overwrite the username field with a 1000-byte buffer, causing the application to become unresponsive and terminate.

Key dates

02Disclosure timeline

February 6, 2026 CVE published
February 17, 2026 Record updated