CVE-2021-47764

MEDIUM
2026-01-15 [email protected]
5.5
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
PoC Detected
Jan 26, 2026 - 16:15 vuln.today
Public exploit code
CVE Published
Jan 15, 2026 - 16:16 nvd
MEDIUM 5.5

Tags

Denial Of Service Absolutetelnet

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.

Analysis

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. [CVSS 5.5 MEDIUM]

Technical Context

Classified as CWE-787 (Out-of-bounds Write). Affects Absolutetelnet. 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.

Affected Products

Vendor: Celestialsoftware. Product: Absolutetelnet. Versions: up to 11.24.

Remediation

Monitor vendor advisories for a patch. Enable ASLR, DEP/NX, and stack canaries where possible.

Priority Score

48
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +28
POC: +20

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CVE-2021-47764 vulnerability details – vuln.today
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