What’s Vulnerable › Vulnerabilities

CVE-2021-47765: AbsoluteTelnet 11.24 - 'Username' Denial of Service (PoC)

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-01-15 · updated 2026-06-17
• Weakness: CWE-787

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.

Affected products

• Celestial Software AbsoluteTelnet: 11.24

References

• https://www.celestialsoftware.net/
• https://www.exploit-db.com/exploits/50510

Get alerted when CVE-2021-47765 or the next vulnerability affects your stack