{"id":"CVE-2020-37166","aliases":["EUVD-2020-31118","GHSA-vp6j-grx7-8jmx"],"status":"published","title":"AbsoluteTelnet 11.12 - 'SSH2/username' Denial of Service","description":"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.","severity":{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00237,"percentile":0.14798,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-120"],"published":"2026-02-06T23:14:12Z","modified":"2026-10-01T15:19:36Z","products":[{"vendor":"celestial software","product":"absolutetelnet"},{"vendor":"celestialsoftware","product":"absolutetelnet"}],"references":[{"url":"https://www.exploit-db.com/exploits/48010","tags":["exploit","Exploit","Third Party Advisory","VDB Entry"]},{"url":"https://www.celestialsoftware.net/","tags":["product","Product"]},{"url":"https://www.vulncheck.com/advisories/absolutetelnet-sshusername-denial-of-service","tags":["third-party-advisory","Broken Link"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-37166"},{"url":"https://www.celestialsoftware.net"},{"url":"https://github.com/advisories/GHSA-vp6j-grx7-8jmx"}],"sources":{"cve":[{"id":"CVE-2020-37166","title":"AbsoluteTelnet 11.12 - 'SSH2/username' Denial of Service","description":"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.","status":"published","published":"2026-02-06T23:14:12.943Z","modified":"2026-10-01T15:19:36.986Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T14:35:47.22408Z"}],"euvd":[{"id":"EUVD-2020-31118","description":"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.","status":"published","published":"2026-02-06T23:14:12Z","modified":"2026-10-01T15:19:36Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T17:27:45.358437Z"}],"ghsa":[{"id":"GHSA-vp6j-grx7-8jmx","title":"AbsoluteTelnet 11.12 contains a denial of service vulnerability in the SSH2 username input field...","description":"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.","status":"published","published":"2026-02-07T00:30:28Z","modified":"2026-02-07T00:30:34Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"},{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T15:06:05.349002Z"}],"nvd":[{"id":"CVE-2020-37166","description":"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.","status":"published","published":"2026-02-07T00:15:57.117Z","modified":"2026-06-17T03:17:09.543Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T14:06:48.591569Z"}]}}