Denial of Service Vulnerability in AbsoluteTelnet by Celestial Software
CVE-2020-37166

6.9MEDIUM

Key Information:

Vendor

Celestial Software

Status
Absolutetelnet
Vendor
CVE Published:
6 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2020-37166?

AbsoluteTelnet 11.12 is susceptible to a denial of service vulnerability in the SSH2 username input field. This flaw allows local attackers to exploit the application by overwriting the username field with a 1000-byte buffer, leading to application crashes and unresponsiveness. It is critical for users of this software to secure their systems to prevent unauthorized access and potential disruptions.

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Affected Version(s)

AbsoluteTelnet 11.12

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2020-37166 - Proof of Concept

References

https://www.exploit-db.com/exploits/48010
exploit
https://www.celestialsoftware.net/
product
https://www.vulncheck.com/advisories/absolutetelnet-sshus...
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

chuyreds
JSON
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