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CVE-2020-37166

AbsoluteTelnet 11.12 - 'SSH2/username' Denial of Service

Published: Feb 6, 2026Updated: Feb 19, 2026 Sources: CVE List NVDCWE-120
6.2MEDIUM
NVD MITRE
EPSS Score
0.2%
Top 88.3%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
No Fix Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-120

Affected Products

Celestial Software
oss-projectaka celestialsoftware
AbsoluteTelnetOn-prem
OSS Libraries / generic-library
and 1 more affected products View all →

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://www.celestialsoftware.net/
celestialsoftware.net
https://www.exploit-db.com/exploits/48010
exploit-db.com
https://www.vulncheck.com/advisories/absolutetelnet-sshusername-denial-of-service
vulncheck.com

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