{"id":"CVE-2019-8271","aliases":["EUVD-2019-17669","GHSA-chf5-hvp8-v7wp"],"status":"published","title":"UltraVNC revision 1211 has a heap buffer overflow vulnerability in VNC server code inside file...","description":"UltraVNC revision 1211 has a heap buffer overflow vulnerability in VNC server code inside file transfer handler, which can potentially result code execution. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1212.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.08263,"percentile":0.94944,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-122","CWE-787"],"published":"2019-03-08T23:29:00.717Z","modified":"2026-06-17T02:41:47Z","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-19-018-ultravnc-heap-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://nvd.nist.gov/vuln/detail/CVE-2019-8271"},{"url":"https://github.com/advisories/GHSA-chf5-hvp8-v7wp"}],"sources":{"cve":[{"id":"CVE-2019-8271","description":"UltraVNC revision 1211 has a heap buffer overflow vulnerability in VNC server code inside file transfer handler, which can potentially result code execution. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1212.","status":"published","published":"2019-03-09T00:00:00Z","modified":"2024-09-16T23:26:16.493Z","cwes":["CWE-122"],"updated_at":"2026-11-02T14:20:21.703364Z"}],"euvd":[{"id":"EUVD-2019-17669","description":"UltraVNC revision 1211 has a heap buffer overflow vulnerability in VNC server code inside file transfer handler, which can potentially result code execution. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1212.","status":"published","published":"2019-03-09T00:00:00Z","modified":"2024-09-16T23:26:16Z","updated_at":"2026-11-03T00:54:50.852699Z"}],"ghsa":[{"id":"GHSA-chf5-hvp8-v7wp","title":"UltraVNC revision 1211 has a heap buffer overflow vulnerability in VNC server code inside file...","description":"UltraVNC revision 1211 has a heap buffer overflow vulnerability in VNC server code inside file transfer handler, which can potentially result code execution. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1212.","status":"published","published":"2022-05-13T01:14:27Z","modified":"2023-02-01T05:04:24Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:50:09.415947Z"}],"nvd":[{"id":"CVE-2019-8271","description":"UltraVNC revision 1211 has a heap buffer overflow vulnerability in VNC server code inside file transfer handler, which can potentially result code execution. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1212.","status":"published","published":"2019-03-08T23:29:00.717Z","modified":"2026-06-17T02:41:47.257Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-122","CWE-787"],"updated_at":"2026-11-02T14:05:07.268578Z"}]}}