{"id":"CVE-2026-20942","aliases":[],"cve":{"records":[{"id":"CVE-2026-20942","source":"microsoft","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2025-12-04T20:04:16.338Z","published":"2026-10-29T15:21:46.978Z","modified":"2026-10-30T19:15:02.437Z"}],"publishers":[{"name":"microsoft","role":"CNA","organizationId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","modified":"2026-10-30T19:15:02.437Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-10-30T13:46:52.834Z"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20942","tags":["vendor-advisory","patch"],"source":"microsoft"}],"weaknesses":[{"id":"CWE-1021","description":"CWE-1021: Improper Restriction of Rendered UI Layers or Frames","source":"microsoft"}],"applicability":[{"source":"microsoft","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:edge_chromium:*:*:*:*:*:*:*:*","versionStartIncluding":"1.0.0.0","versionEndExcluding":"156.0.4314.42"}]}]}]}],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-10-30T13:38:48.039402Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"partial"}]}]},"title":"Microsoft Edge (Chromium-based) Spoofing Vulnerability","titleSource":"microsoft","descriptionSource":"microsoft","description":"Improper restriction of rendered ui layers or frames in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.","score":4.3,"severity":"medium","published":"2026-10-29T15:21:46.978Z","modified":"2026-10-30T19:15:02.437Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Microsoft","name":"Microsoft Edge (Chromium-based)","platforms":[],"versions":[{"version":"1.0.0.0","status":"affected","lessThan":"156.0.4314.42","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-20942"}],"remediation":[],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20942"],"sources":[{"name":"CVE","id":"CVE-2026-20942","modified":"2026-10-30T19:15:02.437Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-20942"}],"assessments":[{"source":"microsoft","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C","score":4.3}],"sourceAffected":[],"observedAt":"2026-10-30T19:47:25.707Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T09:10:30.844Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-10-30T15:40:43.798Z","attemptedAt":"2026-10-30T15:40:43.798Z"},{"source":"GHSA","status":"available","checkedAt":"2026-10-30T15:40:44.877Z","attemptedAt":"2026-10-30T15:40:44.877Z"},{"source":"EUVD","status":"refresh-failed","attemptedAt":"2026-10-30T15:40:39.857Z"},{"source":"EPSS","status":"available","checkedAt":"2026-10-30T15:40:45.595Z","attemptedAt":"2026-10-30T15:40:45.595Z"}],"evidence":[{"source":"NVD","id":"CVE-2026-20942","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-20942","modified":"2026-10-30T14:17:05.497","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","checkedAt":"2026-10-30T15:40:43.798Z"},{"source":"GitHub Advisory Database","id":"GHSA-46jg-xg9r-688p","url":"https://github.com/advisories/GHSA-46jg-xg9r-688p","modified":"2026-10-29T18:31:09Z","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","checkedAt":"2026-10-30T15:40:44.877Z"},{"source":"FIRST EPSS","id":"CVE-2026-20942","url":"https://www.first.org/epss/","probability":0.00642,"percentile":0.50748,"date":"2026-10-30","checkedAt":"2026-10-30T15:40:45.595Z"}],"aiSummary":{"text":"Microsoft Edge (Chromium-based) versions before 156.0.4314.42 have a spoofing vulnerability due to improper restriction of rendered UI layers or frames, allowing an attacker to perform spoofing over a network. The vulnerability is caused by CWE-1021. An attacker needs network access to exploit this weakness.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-30T10:05:07.916Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-20942"}]}}