CVE-2020-37166

AbsoluteTelnet 11.12 - 'SSH2/username' Denial of Service

Published Feb 6, 2026 CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Celestialsoftware
Celestialsoftware absolutetelnet
CPEs cpe:2.3:a:celestialsoftware:absolutetelnet:11.12:*:*:*:*:*:*:*
Vendors & Products Celestialsoftware
Celestialsoftware absolutetelnet
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Celestial Software
Celestial Software absolutetelnet
Vendors & Products Celestial Software
Celestial Software absolutetelnet
Type Values Removed Values Added
Description 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.
Title AbsoluteTelnet 11.12 - 'SSH2/username' Denial of Service
Weaknesses CWE-120
References
Metrics cvssV3_1

{'score': 6.2, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 6.9, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Oct 1, 2026, 3:19 PM
Reserved
Feb 6, 2026, 12:29 PM
Status
Analyzed
Published
Feb 7, 2026, 12:15 AM
Modified
Jun 17, 2026, 3:17 AM