CVE-2021-47765

MEDIUM

AbsoluteTelnet 11.24 - Denial of Service via Username or Email Field Overflow

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-47765. PoCs published by Yehia Elghaly.

AI-analyzed exploit summary This PoC exploits a denial-of-service vulnerability in AbsoluteTelnet 11.24 by overflowing the 'Username' field with a large number of 'A' characters, causing the application to crash. The exploit generates a text file containing the payload, which is then manually input into the application.

Description

AbsoluteTelnet 11.24 contains a denial of service vulnerability that allows local attackers to crash the application by manipulating username and error report fields. Attackers can trigger the crash by inserting 1000 characters into the username or email address fields, causing the application to become unresponsive.

Exploits (1)

exploitdb WORKING POC
by Yehia Elghaly · pythondoswindows
https://www.exploit-db.com/exploits/50510

This PoC exploits a denial-of-service vulnerability in AbsoluteTelnet 11.24 by overflowing the 'Username' field with a large number of 'A' characters, causing the application to crash. The exploit generates a text file containing the payload, which is then manually input into the application.

Classification
Working Poc 95%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: AbsoluteTelnet 11.24
No auth needed
Prerequisites: AbsoluteTelnet 11.24 installed · ability to run Python script to generate payload
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (2)

Core 2
Core References
Exploit, Third Party Advisory exploit
https://www.exploit-db.com/exploits/50510

Scores

CVSS v3 5.5
EPSS 0.0017
EPSS Percentile 7.1%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-787
Status published
Products (1)
celestialsoftware/absolutetelnet 11.24
Published Jan 15, 2026
Tracked Since Feb 18, 2026