{"id":"CVE-2026-20819","title":"Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to disclose information locally.","summary":"Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to disclose information locally.","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-822"],"vendor":"microsoft","product":"windows_11_23h2","affected":["windows_11_23h2 < 10.0.22631.6491","windows_11_24h2 < 10.0.26100.7623","windows_11_25h2 < 10.0.26200.7623"],"patched":["windows_11_23h2 10.0.22631.6491","windows_11_24h2 10.0.26100.7623","windows_11_25h2 10.0.26200.7623"],"published":"2026-01-13","updated":"2026-07-30","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-20819","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20819","label":"secure@microsoft.com"}],"tags":["nvd"],"epss":0.00551,"epssPercentile":0.44966,"ingestedAt":"2026-07-31T06:58:51.408Z","slug":"CVE-2026-20819","body":"## Overview\n\nUntrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to disclose information locally.\n\n## Affected\n\n- `windows_11_23h2 < 10.0.22631.6491`\n- `windows_11_24h2 < 10.0.26100.7623`\n- `windows_11_25h2 < 10.0.26200.7623`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `windows_11_23h2 10.0.22631.6491`\n- `windows_11_24h2 10.0.26100.7623`\n- `windows_11_25h2 10.0.26200.7623`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}