{"id":"CVE-2026-77178","title":"Oracle VM VirtualBox before 7.2.8 allows guest OS users to cause an out-of-bounds write in the host OS in pcnetReceiveNoSync in DevPCNet.cpp in the PCNet (Am79C970A) network device model.","summary":"Oracle VM VirtualBox before 7.2.8 allows guest OS users to cause an out-of-bounds write in the host OS in pcnetReceiveNoSync in DevPCNet.cpp in the PCNet (Am79C970A) network device model.","severity":"critical","cvss":9.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","cwe":["CWE-787"],"published":"2026-10-06","updated":"2026-10-06","sourceUpdated":"2026-10-06T18:16:55.970","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-77178","references":[{"url":"https://gist.github.com/entropy1337/cd0d5b368445d20c43aca2590b313892","label":"cve@mitre.org"},{"url":"https://www.oracle.com/","label":"cve@mitre.org"},{"url":"https://www.virtualbox.org/wiki/Download_Old_Builds_7_0","label":"cve@mitre.org"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-10-06T17:32:27.645112Z"},"ingestedAt":"2026-10-06T14:00:19.140Z","epss":0.00335,"epssPercentile":0.26673,"slug":"CVE-2026-77178","body":"## Overview\n\nOracle VM VirtualBox before 7.2.8 allows guest OS users to cause an out-of-bounds write in the host OS in pcnetReceiveNoSync in DevPCNet.cpp in the PCNet (Am79C970A) network device model.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":50,"depthScoreParts":{"impact":50.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":216667,"id":"CVE-2026-77178","ts":1791310393190,"field":"cvss","old":null,"new":"9.1"},{"seq":216666,"id":"CVE-2026-77178","ts":1791310393190,"field":"severity","old":"none","new":"critical"}]}