{"id":"CVE-2026-62798","state":"PUBLISHED","title":"Win32k Information Disclosure Vulnerability","description":"Untrusted pointer dereference in Windows Win32K allows an authorized attacker to disclose information locally.","publishedAt":"2026-08-11T17:04:26.976Z","updatedAt":"2026-10-30T17:20:15.934Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","source":"microsoft"},"assigner":"microsoft","products":["Microsoft Windows 11 version 23H2","Microsoft Windows 11 Version 23H2","Microsoft Windows 11 Version 24H2","Microsoft Windows 11 Version 25H2","Microsoft Windows 11 version 26H1","Microsoft Windows Server 2025","Microsoft Windows Server 2025 (Server Core installation)"],"affected":[{"vendor":"Microsoft","product":"Windows 11 version 23H2","versions":[{"version":"10.0.22631.0","status":"affected","lessThan":"10.0.22631.7517","versionType":"custom"}],"platforms":["ARM64-based Systems"]},{"vendor":"Microsoft","product":"Windows 11 Version 23H2","versions":[{"version":"10.0.22631.0","status":"affected","lessThan":"10.0.22631.7517","versionType":"custom"}],"platforms":["x64-based Systems"]},{"vendor":"Microsoft","product":"Windows 11 Version 24H2","versions":[{"version":"10.0.26100.0","status":"affected","lessThan":"10.0.26100.9168","versionType":"custom"}],"platforms":["ARM64-based Systems","x64-based Systems"]},{"vendor":"Microsoft","product":"Windows 11 Version 25H2","versions":[{"version":"10.0.26200.0","status":"affected","lessThan":"10.0.26200.9168","versionType":"custom"}],"platforms":["ARM64-based Systems","x64-based Systems"]},{"vendor":"Microsoft","product":"Windows 11 version 26H1","versions":[{"version":"10.0.28000.0","status":"affected","lessThan":"10.0.28000.2704","versionType":"custom"}],"platforms":["ARM64-based Systems","x64-based Systems"]},{"vendor":"Microsoft","product":"Windows Server 2025","versions":[{"version":"10.0.26100.0","status":"affected","lessThan":"10.0.26100.33296","versionType":"custom"}],"platforms":["x64-based Systems"]},{"vendor":"Microsoft","product":"Windows Server 2025 (Server Core installation)","versions":[{"version":"10.0.26100.0","status":"affected","lessThan":"10.0.26100.33296","versionType":"custom"}],"platforms":["x64-based Systems"]}],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62798"],"weaknesses":["CWE-822"],"ingestedAt":"2026-10-30T17:30:05.412Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/62xxx/CVE-2026-62798.json","commit":"3341b8c15da9d44519feb86e18f02f360209d08a","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-62798","state":"PUBLISHED","datePublished":"2026-08-11T17:04:26.976Z","dateUpdated":"2026-10-30T17:20:15.934Z","assignerShortName":"microsoft","assignerOrgId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","dateReserved":"2026-07-14T21:08:07.965Z"},"containers":{"cna":{"title":"Win32k Information Disclosure Vulnerability","descriptions":[{"lang":"en-US","value":"Untrusted pointer dereference in Windows Win32K allows an authorized attacker to disclose information locally."}],"affected":[{"vendor":"Microsoft","product":"Windows 11 version 23H2","versions":[{"version":"10.0.22631.0","status":"affected","lessThan":"10.0.22631.7517","versionType":"custom"}],"platforms":["ARM64-based Systems"]},{"vendor":"Microsoft","product":"Windows 11 Version 23H2","versions":[{"version":"10.0.22631.0","status":"affected","lessThan":"10.0.22631.7517","versionType":"custom"}],"platforms":["x64-based Systems"]},{"vendor":"Microsoft","product":"Windows 11 Version 24H2","versions":[{"version":"10.0.26100.0","status":"affected","lessThan":"10.0.26100.9168","versionType":"custom"}],"platforms":["ARM64-based Systems","x64-based Systems"]},{"vendor":"Microsoft","product":"Windows 11 Version 25H2","versions":[{"version":"10.0.26200.0","status":"affected","lessThan":"10.0.26200.9168","versionType":"custom"}],"platforms":["ARM64-based Systems","x64-based Systems"]},{"vendor":"Microsoft","product":"Windows 11 version 26H1","versions":[{"version":"10.0.28000.0","status":"affected","lessThan":"10.0.28000.2704","versionType":"custom"}],"platforms":["ARM64-based Systems","x64-based Systems"]},{"vendor":"Microsoft","product":"Windows Server 2025","versions":[{"version":"10.0.26100.0","status":"affected","lessThan":"10.0.26100.33296","versionType":"custom"}],"platforms":["x64-based Systems"]},{"vendor":"Microsoft","product":"Windows Server 2025 (Server Core installation)","versions":[{"version":"10.0.26100.0","status":"affected","lessThan":"10.0.26100.33296","versionType":"custom"}],"platforms":["x64-based Systems"]}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62798","name":"Win32k Information Disclosure Vulnerability","tags":["vendor-advisory","patch"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en-US","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","baseSeverity":"MEDIUM","baseScore":5.5,"vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-822","description":"CWE-822: Untrusted Pointer Dereference","lang":"en-US","type":"CWE"}]}],"providerMetadata":{"shortName":"microsoft","orgId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","dateUpdated":"2026-10-30T17:20:15.934Z"},"datePublic":"2026-08-11T14:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*","versionStartIncluding":"10.0.26100.0","versionEndExcluding":"10.0.26100.33296"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*","versionStartIncluding":"10.0.26200.0","versionEndExcluding":"10.0.26200.9168"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*","versionStartIncluding":"10.0.22631.0","versionEndExcluding":"10.0.22631.7517"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*","versionStartIncluding":"10.0.22631.0","versionEndExcluding":"10.0.22631.7517"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*","versionStartIncluding":"10.0.26100.0","versionEndExcluding":"10.0.26100.9168"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*","versionStartIncluding":"10.0.26100.0","versionEndExcluding":"10.0.26100.33296"},{"vulnerable":true,"criteria":"cpe:2.3:o:microsoft:windows_11_26H1:*:*:*:*:*:*:x64:*","versionStartIncluding":"10.0.28000.0","versionEndExcluding":"10.0.28000.2704"}]}]}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-11T20:38:25.639085Z","id":"CVE-2026-62798","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-11T20:53:35.733Z"}}]}}}