Buffer overflow in Celestial Software Absolutetelnet
CVE-2020-37166
AbsoluteTelnet 11.12 contains a denial of service vulnerability in the SSH2 username input field that allows local attackers to crash the application. Attackers can overwrite the username field with a 1000-byte buffer, causing the application to become unresponsive and terminate.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.002 (12.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 12.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Celestial Software Absolutetelnet — versions 11.12
- Celestialsoftware Absolutetelnet — versions 11.12
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/48010 (Exploit, VDB Entry, Third Party Advisory, exploit)
- www.celestialsoftware.net/ (Product, product)
- www.vulncheck.com/advisories/absolutetelnet-sshusername-denial-of-service (Broken Link, third-party-advisory)
Frequently asked questions
- What is CVE-2020-37166?
- CVE-2020-37166 is a medium-severity vulnerability in Celestial Software Absolutetelnet, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.2/10. Published 2026-02-07.
- How severe is CVE-2020-37166?
- Medium severity. CVSS v3 base score is 6.2 out of 10.