{"id":"CVE-2019-8263","aliases":["EUVD-2019-17661","GHSA-3ccg-xj7w-w764"],"status":"published","title":"UltraVNC revision 1205 has stack-based buffer overflow vulnerability in VNC client code inside...","description":"UltraVNC revision 1205 has stack-based buffer overflow vulnerability in VNC client code inside ShowConnInfo routine, which leads to a denial of service (DoS) condition. This attack appear to be exploitable via network connectivity. User interaction is required to trigger this vulnerability. This vulnerability has been fixed in revision 1206.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.0248,"percentile":0.84684,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-121","CWE-787"],"published":"2019-03-05T15:00:00Z","modified":"2026-06-17T02:41:46Z","products":[{"vendor":"kaspersky lab","product":"ultravnc"},{"vendor":"siemens","product":"sinumerik_access_mymachine\\/p2p"},{"vendor":"siemens","product":"sinumerik_pcu_base_win10_software\\/ipc"},{"vendor":"siemens","product":"sinumerik_pcu_base_win7_software\\/ipc"},{"vendor":"uvnc","product":"ultravnc"}],"references":[{"url":"https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-009-ultravnc-access-of-memory-location-after-end-of-buffer/","tags":["x_refsource_MISC","x_transferred","Not Applicable","Third Party Advisory"]},{"url":"https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-010-ultravnc-stack-based-buffer-overflow/","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory"]},{"url":"https://www.us-cert.gov/ics/advisories/icsa-20-161-06","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","US Government Resource"]},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-940818.pdf","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-286838.pdf","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://us-cert.cisa.gov/ics/advisories/icsa-21-131-11","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-8263"},{"url":"https://github.com/advisories/GHSA-3ccg-xj7w-w764"}],"sources":{"cve":[{"id":"CVE-2019-8263","description":"UltraVNC revision 1205 has stack-based buffer overflow vulnerability in VNC client code inside ShowConnInfo routine, which leads to a denial of service (DoS) condition. This attack appear to be exploitable via network connectivity. User interaction is required to trigger this vulnerability. This vulnerability has been fixed in revision 1206.","status":"published","published":"2019-03-05T15:00:00Z","modified":"2024-09-16T23:56:07.697Z","cwes":["CWE-121"],"updated_at":"2026-11-02T14:20:21.703364Z"}],"euvd":[{"id":"EUVD-2019-17661","description":"UltraVNC revision 1205 has stack-based buffer overflow vulnerability in VNC client code inside ShowConnInfo routine, which leads to a denial of service (DoS) condition. This attack appear to be exploitable via network connectivity. User interaction is required to trigger this vulnerability. This vulnerability has been fixed in revision 1206.","status":"published","published":"2019-03-05T15:00:00Z","modified":"2024-09-16T23:56:07Z","updated_at":"2026-11-03T00:29:03.911526Z"}],"ghsa":[{"id":"GHSA-3ccg-xj7w-w764","title":"UltraVNC revision 1205 has stack-based buffer overflow vulnerability in VNC client code inside...","description":"UltraVNC revision 1205 has stack-based buffer overflow vulnerability in VNC client code inside ShowConnInfo routine, which leads to a denial of service (DoS) condition. This attack appear to be exploitable via network connectivity. User interaction is required to trigger this vulnerability. This vulnerability has been fixed in revision 1206.","status":"published","published":"2022-05-13T01:09:08Z","modified":"2023-02-01T05:03:29Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:50:03.88435Z"}],"nvd":[{"id":"CVE-2019-8263","description":"UltraVNC revision 1205 has stack-based buffer overflow vulnerability in VNC client code inside ShowConnInfo routine, which leads to a denial of service (DoS) condition. This attack appear to be exploitable via network connectivity. User interaction is required to trigger this vulnerability. This vulnerability has been fixed in revision 1206.","status":"published","published":"2019-03-05T15:29:00.507Z","modified":"2026-06-17T02:41:46.387Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-121","CWE-787"],"updated_at":"2026-11-02T14:05:07.268578Z"}]}}