{"id":"CVE-2019-25601","title":"UltraVNC Launcher 1.2.2.4 Denial of Service Buffer Overflow","summary":"UltraVNC Launcher 1.2.2.4 contains a buffer overflow vulnerability in the Path vncviewer.exe property field that allows local attackers to crash the application by supplying an excessively long string. Attackers can input a 300-byte payl…","severity":"medium","cvss":6.2,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-787"],"vendor":"Uvnc","product":"UltraVNC Launcher","affected":["ultravnc_launcher 1.2.2.4"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-03-23T16:16:39.738568Z"},"exploitAvailable":true,"published":"2026-03-22","updated":"2026-10-01","sourceUpdated":"2026-10-01T21:44:52.782Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2019-25601","references":[{"url":"https://www.exploit-db.com/exploits/46703","label":"ExploitDB-46703"},{"url":"https://www.uvnc.com/","label":"Official Product Homepage"},{"url":"https://www.uvnc.com/downloads/ultravnc/126-download-ultravnc-1224.html","label":"Product Reference"},{"url":"https://www.vulncheck.com/advisories/ultravnc-launcher-denial-of-service-buffer-overflow","label":"VulnCheck Advisory: UltraVNC Launcher 1.2.2.4 Denial of Service Buffer Overflow"}],"tags":["cve.org","exploit-available"],"epss":0.00263,"epssPercentile":0.16428,"ingestedAt":"2026-10-01T23:03:32.845Z","slug":"CVE-2019-25601","body":"## Overview\n\nUltraVNC Launcher 1.2.2.4 contains a buffer overflow vulnerability in the Path vncviewer.exe property field that allows local attackers to crash the application by supplying an excessively long string. Attackers can input a 300-byte payload of repeated characters through the Properties dialog to trigger a denial of service condition.\n\n## Affected\n\n- `ultravnc_launcher 1.2.2.4`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":34.1,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[]}