Vulnerability · Published Jan 15, 2026 · Assigned by VulnCheck
CVE-2021-47765AbsoluteTelnet 11.24 - 'Username' Denial of Service (PoC)
Medium 5.5
In plain English
A medium-severity out-of-bounds write in AbsoluteTelnet from Celestialsoftware. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities).
Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.2%top 90.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Celestialsoftware | AbsoluteTelnet | 11.24 |
Weakness: CWE-787 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
References
- ExploitDB-50510 exploit
- Vendor Homepage product