CVE-2020-37166

MEDIUM

AbsoluteTelnet 11.12 - Denial of Service via SSH2 Username Buffer Overflow

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2020-37166. PoCs published by chuyreds.

AI-analyzed exploit summary This PoC exploits a denial of service vulnerability in AbsoluteTelnet 11.12 by overflowing the 'SSH2/username' field with a large buffer of 'A' characters, causing the application to crash. The exploit requires manual steps to trigger the crash by pasting the malicious input into the username field.

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.

Exploits (1)

exploitdb WORKING POC
by chuyreds · pythondoswindows
https://www.exploit-db.com/exploits/48010

This PoC exploits a denial of service vulnerability in AbsoluteTelnet 11.12 by overflowing the 'SSH2/username' field with a large buffer of 'A' characters, causing the application to crash. The exploit requires manual steps to trigger the crash by pasting the malicious input into the username field.

Classification
Working Poc 95%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: AbsoluteTelnet 11.12
No auth needed
Prerequisites: AbsoluteTelnet 11.12 installed on Windows · User interaction to paste malicious input
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Exploit, Third Party Advisory exploit
https://www.exploit-db.com/exploits/48010
Various Sources product
https://www.celestialsoftware.net/

Scores

CVSS v3 6.2
EPSS 0.0021
EPSS Percentile 11.6%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-120
Status published
Products (1)
celestialsoftware/absolutetelnet 11.12
Published Feb 07, 2026
Tracked Since Feb 18, 2026