{"id":"CVE-2020-37133","aliases":["EUVD-2020-31031","GHSA-xxc7-rq23-x492"],"status":"published","title":"UltraVNC Launcher 1.2.4.0 - 'RepeaterHost' Denial of Service","description":"UltraVNC Launcher 1.2.4.0 contains a denial of service vulnerability in the Repeater Host configuration field that allows attackers to crash the application. Attackers can paste an overly long string of 300 characters into the Repeater Host property to trigger an application crash.","severity":{"version":"4.0","score":6.7,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00538,"percentile":0.45614,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-121","CWE-787"],"published":"2026-02-05T16:13:36Z","modified":"2026-06-17T03:17:04Z","products":[{"vendor":"ultravnc team","product":"ultravnc launcher"},{"vendor":"uvnc","product":"ultravnc"},{"vendor":"uvnc","product":"ultravnc launcher"}],"references":[{"url":"https://www.exploit-db.com/exploits/48288","tags":["exploit","Exploit","Third Party Advisory","VDB Entry"]},{"url":"https://www.uvnc.com/","tags":["product","Product"]},{"url":"https://www.vulncheck.com/advisories/ultravnc-launcher-repeaterhost-denial-of-service","tags":["third-party-advisory","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-37133"},{"url":"https://www.uvnc.com"},{"url":"https://github.com/advisories/GHSA-xxc7-rq23-x492"}],"sources":{"cve":[{"id":"CVE-2020-37133","title":"UltraVNC Launcher 1.2.4.0 - 'RepeaterHost' Denial of Service","description":"UltraVNC Launcher 1.2.4.0 contains a denial of service vulnerability in the Repeater Host configuration field that allows attackers to crash the application. Attackers can paste an overly long string of 300 characters into the Repeater Host property to trigger an application crash.","status":"published","published":"2026-02-05T16:13:36.48Z","modified":"2026-02-05T18:44:22.255Z","cvss":[{"version":"4.0","score":6.7,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T14:35:47.22408Z"}],"euvd":[{"id":"EUVD-2020-31031","description":"UltraVNC Launcher 1.2.4.0 contains a denial of service vulnerability in the Repeater Host configuration field that allows attackers to crash the application. Attackers can paste an overly long string of 300 characters into the Repeater Host property to trigger an application crash.","status":"published","published":"2026-02-05T16:13:36Z","modified":"2026-02-05T18:44:22Z","cvss":[{"version":"4.0","score":6.7,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T19:48:43.229255Z"}],"ghsa":[{"id":"GHSA-xxc7-rq23-x492","title":"UltraVNC Launcher 1.2.4.0 contains a denial of service vulnerability in the Repeater Host...","description":"UltraVNC Launcher 1.2.4.0 contains a denial of service vulnerability in the Repeater Host configuration field that allows attackers to crash the application. Attackers can paste an overly long string of 300 characters into the Repeater Host property to trigger an application crash.","status":"published","published":"2026-02-05T18:30:31Z","modified":"2026-02-10T00:31:32Z","cvss":[{"version":"4.0","score":6.7,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/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":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-121","CWE-787"],"updated_at":"2026-11-02T15:06:06.621924Z"}],"nvd":[{"id":"CVE-2020-37133","description":"UltraVNC Launcher 1.2.4.0 contains a denial of service vulnerability in the Repeater Host configuration field that allows attackers to crash the application. Attackers can paste an overly long string of 300 characters into the Repeater Host property to trigger an application crash.","status":"published","published":"2026-02-05T17:16:08.53Z","modified":"2026-06-17T03:17:04.54Z","cvss":[{"version":"4.0","score":6.7,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/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":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-121","CWE-787"],"updated_at":"2026-11-02T14:06:48.591569Z"}]}}