CVE-2021-47765: 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 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.

Affected products

• Celestialsoftware Absolutetelnet: version 11.24 only

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