CVE-2021-47765 - CVE House
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Status published Medium CVE-2021-47765

AbsoluteTelnet 11.24 - 'Username' Denial of Service (PoC)

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Yehia Elghaly

References

More from Celestialsoftware

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CVE-2021-47764
AbsoluteTelnet 11.24 - 'Phone' Denial of Service (PoC)
Medium 6.7

Affected Vendor

Celestialsoftware

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Affected Software

AbsoluteTelnet
Vulnerable Versions:
11.24

Timeline

Official Publish: January 15th, 2026
Last Modified: January 26th, 2026
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weaknesses (CWE)

CWE-787

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application
Initial Access
T1068 Exploitation for Privilege Escalation
Privilege Escalation
T1055 Process Injection
Defense Evasion
T1105 Ingress Tool Transfer
Command and Control
T1485 Data Destruction
Impact