CVE-2021-47764

MEDIUM

AbsoluteTelnet 11.24 - Denial of Service via DialUp Connection and License Name Fields

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-47764. PoCs published by Yehia Elghaly.

AI-analyzed exploit summary This PoC exploits a Denial of Service (DoS) vulnerability in AbsoluteTelnet 11.24 by overwriting the 'Phone' or 'license name' fields with a large string of 'A' characters, causing the application to crash. The exploit generates a text file with the payload, which is then manually input into the vulnerable fields.

Description

AbsoluteTelnet 11.24 contains a denial of service vulnerability that allows local attackers to crash the application by manipulating DialUp connection and license name fields. Attackers can generate a 1000-character payload and paste it into specific input fields to trigger application crashes and force unexpected termination.

Exploits (1)

exploitdb WORKING POC
by Yehia Elghaly · pythondoswindows
https://www.exploit-db.com/exploits/50511

This PoC exploits a Denial of Service (DoS) vulnerability in AbsoluteTelnet 11.24 by overwriting the 'Phone' or 'license name' fields with a large string of 'A' characters, causing the application to crash. The exploit generates a text file with the payload, which is then manually input into the vulnerable fields.

Classification
Working Poc 90%
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 · manual input of payload into vulnerable fields
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/50511

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