CVE-2020-37166CWE-120

AbsoluteTelnet 11.12 - 'SSH2/username' Denial of Service

Medium · published February 6, 2026

CVSS v4.0
6.9
EPSS
0%
Percentile
14.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.9 · MEDIUM
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
EPSS
0.00240 · 14.3th percentile
Weakness
CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Published
2026-02-06T23:14Z
EPSS history
Timeline
  • 06 FEB 23:14Z
    AbsoluteTelnet 11.12 - 'SSH2/username' Denial of Service
    cvelistv5