{"id":"CVE-2026-70578","title":"Heap-based buffer overflow in Windows Credential Guard allows an authorized attacker to elevate privileges locally.","summary":"Heap-based buffer overflow in Windows Credential Guard allows an authorized attacker to elevate privileges locally.","severity":"high","cvss":7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-122"],"vendor":"microsoft","product":"windows_10_21h2","affected":["windows_10_21h2 < 10.0.19044.7725","windows_10_22h2 < 10.0.19045.7725","windows_11_23h2 < 10.0.22631.7582","windows_11_24h2 < 10.0.26100.9445","windows_11_25h2 < 10.0.26200.9445","windows_11_26h1 < 10.0.28000.2954"],"patched":["windows_10_21h2 10.0.19044.7725","windows_10_22h2 10.0.19045.7725","windows_11_23h2 10.0.22631.7582","windows_11_24h2 10.0.26100.9445","windows_11_25h2 10.0.26200.9445","windows_11_26h1 10.0.28000.2954"],"published":"2026-09-08","updated":"2026-09-24","sourceUpdated":"2026-09-24T19:51:15.783","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-70578","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70578","label":"secure@microsoft.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-09T04:27:44.044978Z"},"epss":0.0027,"epssPercentile":0.17031,"ingestedAt":"2026-09-08T19:08:49.623Z","slug":"CVE-2026-70578","body":"## Overview\n\nHeap-based buffer overflow in Windows Credential Guard allows an authorized attacker to elevate privileges locally.\n\n## Affected\n\n- `windows_10_21h2 < 10.0.19044.7725`\n- `windows_10_22h2 < 10.0.19045.7725`\n- `windows_11_23h2 < 10.0.22631.7582`\n- `windows_11_24h2 < 10.0.26100.9445`\n- `windows_11_25h2 < 10.0.26200.9445`\n- `windows_11_26h1 < 10.0.28000.2954`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `windows_10_21h2 10.0.19044.7725`\n- `windows_10_22h2 10.0.19045.7725`\n- `windows_11_23h2 10.0.22631.7582`\n- `windows_11_24h2 10.0.26100.9445`\n- `windows_11_25h2 10.0.26200.9445`\n- `windows_11_26h1 10.0.28000.2954`","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}