CVE-2021-47764: Celestialsoftware Absolutetelnet

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

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

• Celestialsoftware Absolutetelnet: version 11.24 only

Published 2026-01-15. Last modified 2026-06-17.