CVE-2026-66798

{"id": "CVE-2026-66798", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-66798", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-08-29T03:56:13.736994Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "secure@microsoft.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 2.8}]}, "affected": [{"source": "secure@microsoft.com", "affectedData": [{"vendor": "Microsoft", "product": "Microsoft Edge (Chromium-based)", "versions": [{"status": "affected", "version": "-"}]}, {"vendor": "Microsoft", "product": "Microsoft Edge for Android", "versions": [{"status": "affected", "version": "1.0.0.0", "lessThan": "152.0.4191.52", "versionType": "custom"}]}, {"vendor": "Microsoft", "product": "Microsoft Edge for iOS", "versions": [{"status": "affected", "version": "1.0.0.0", "lessThan": "152.0.4191.52", "versionType": "custom"}]}, {"vendor": "Microsoft", "product": "Microsoft Edge for Linux", "versions": [{"status": "affected", "version": "1.0.0", "lessThan": "152.0.4191.52", "versionType": "custom"}]}, {"vendor": "Microsoft", "product": "Microsoft Edge for MAC", "versions": [{"status": "affected", "version": "1.0.0.0", "lessThan": "152.0.4191.52", "versionType": "custom"}]}, {"vendor": "Microsoft", "product": "Microsoft Edge for Windows", "versions": [{"status": "affected", "version": "1.0.0.0", "lessThan": "152.0.4191.52", "versionType": "custom"}]}]}], "published": "2026-08-28T20:19:34.673", "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66798", "tags": ["Vendor Advisory"], "source": "secure@microsoft.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "secure@microsoft.com", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": "Use after free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network."}], "lastModified": "2026-09-11T17:17:43.290", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:microsoft:edge_chromium:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6E9AEFC6-9482-4267-97E5-03E734356F37", "versionEndExcluding": "152.0.4191.53"}], "operator": "OR"}]}], "sourceIdentifier": "secure@microsoft.com"}