{"id":"CVE-2026-66321","aliases":["EUVD-2026-52522","GHSA-pfc9-39px-jq86"],"status":"published","title":"Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability","description":"Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.","severity":{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-08","score":0.01066,"percentile":0.64977,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-843"],"published":"2026-08-03T22:51:44Z","modified":"2026-11-01T17:32:07Z","products":[{"vendor":"microsoft","product":"edge_chromium"},{"vendor":"microsoft","product":"microsoft edge (chromium-based)"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66321","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-66321"},{"url":"https://github.com/advisories/GHSA-pfc9-39px-jq86"}],"sources":{"cve":[{"id":"CVE-2026-66321","title":"Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability","description":"Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-08-03T22:51:44.398Z","modified":"2026-11-01T17:32:07.367Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-843"],"updated_at":"2026-11-02T14:20:13.272106Z"}],"euvd":[{"id":"EUVD-2026-52522","description":"Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-08-03T22:51:44Z","modified":"2026-11-01T17:32:07Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-02T16:58:49.629727Z"}],"ghsa":[{"id":"GHSA-pfc9-39px-jq86","title":"Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based)...","description":"Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-08-04T00:34:55Z","modified":"2026-08-04T00:35:02Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-843"],"updated_at":"2026-11-02T15:10:03.433591Z"}],"nvd":[{"id":"CVE-2026-66321","description":"Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-08-04T00:17:39.44Z","modified":"2026-10-23T23:10:00.157Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N","level":"high","assessor":"secondary"},{"version":"3.1","score":9.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","level":"critical","assessor":"primary"}],"cwes":["CWE-843"],"updated_at":"2026-11-02T14:12:34.643497Z"}]}}