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.

Metrics

Attack Vector Local

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Active

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00013.

Exploitation poc

Automatable yes

Technical Impact partial

Affected Vendors & Products

Vendors Products
Celestial Software Subscribe
Absolutetelnet Subscribe

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors Products
Celestial Software Subscribe
Absolutetelnet Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://www.celestialsoftware.net/ cve-icon cve-icon
https://www.exploit-db.com/exploits/50511 cve-icon cve-icon
History

Fri, 16 Jan 2026 14:15:00 +0000

Type Values Removed Values Added
First Time appeared Celestial Software
Celestial Software absolutetelnet
Vendors & Products Celestial Software
Celestial Software absolutetelnet

Thu, 15 Jan 2026 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 15 Jan 2026 16:00:00 +0000

Type Values Removed Values Added
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.
Title AbsoluteTelnet 11.24 - 'Phone' Denial of Service (PoC)
Weaknesses CWE-787
References
Metrics cvssV3_1

{'score': 6.2, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 6.7, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-01-15T16:48:07.875Z

Reserved: 2026-01-14T14:39:44.734Z

Link: CVE-2021-47764

cve-icon Vulnrichment

Updated: 2026-01-15T16:48:05.493Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-01-15T16:16:07.663

Modified: 2026-01-16T15:55:33.063

Link: CVE-2021-47764

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-01-16T13:43:16Z

Weaknesses