{"id":"CVE-2026-42978","aliases":["EUVD-2026-35738","GHSA-mjxj-356g-98wq"],"status":"published","title":"Windows Push Notifications Elevation of Privilege Vulnerability","description":"Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Push Notifications allows an authorized attacker to elevate privileges locally.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00314,"percentile":0.24606,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-362","CWE-416"],"published":"2026-06-09T17:06:14Z","modified":"2026-09-24T13:45:04Z","exploits":[{"source":"pocgithub","id":"grizzzer/CVE-2026-42978-PoC-Research","title":"grizzzer/CVE-2026-42978-PoC-Research","date":"2026-06-23","url":"https://github.com/grizzzer/CVE-2026-42978-PoC-Research"},{"source":"pocgithub","id":"SyntaxMethod/CVE-2026-42978-PoC-Research","title":"SyntaxMethod/CVE-2026-42978-PoC-Research","date":"2026-09-11","url":"https://github.com/SyntaxMethod/CVE-2026-42978-PoC-Research"},{"source":"pocgithub","id":"coactionbrittlemaidenhair51/CVE-2026-42978-PoC-Research","title":"coactionbrittlemaidenhair51/CVE-2026-42978-PoC-Research","date":"2026-09-21","url":"https://github.com/coactionbrittlemaidenhair51/CVE-2026-42978-PoC-Research"},{"source":"pocgithub","id":"coactionbrittlemaidenhair51/coactionbrittlemaidenhair51.github.io","title":"coactionbrittlemaidenhair51/coactionbrittlemaidenhair51.github.io","date":"2026-09-21","url":"https://github.com/coactionbrittlemaidenhair51/coactionbrittlemaidenhair51.github.io"}],"products":[{"vendor":"microsoft","product":"windows 10 version 1809"},{"vendor":"microsoft","product":"windows 10 version 21h2"},{"vendor":"microsoft","product":"windows 10 version 22h2"},{"vendor":"microsoft","product":"windows 11 version 23h2"},{"vendor":"microsoft","product":"windows 11 version 24h2"},{"vendor":"microsoft","product":"windows 11 version 25h2"},{"vendor":"microsoft","product":"windows 11 version 26h1"},{"vendor":"microsoft","product":"windows server 2019"},{"vendor":"microsoft","product":"windows server 2019 (server core installation)"},{"vendor":"microsoft","product":"windows server 2022"},{"vendor":"microsoft","product":"windows server 2025"},{"vendor":"microsoft","product":"windows server 2025 (server core installation)"},{"vendor":"microsoft","product":"windows_10_1809"},{"vendor":"microsoft","product":"windows_10_21h2"},{"vendor":"microsoft","product":"windows_10_22h2"},{"vendor":"microsoft","product":"windows_11_23h2"},{"vendor":"microsoft","product":"windows_11_24h2"},{"vendor":"microsoft","product":"windows_11_25h2"},{"vendor":"microsoft","product":"windows_11_26h1"},{"vendor":"microsoft","product":"windows_server_2019"},{"vendor":"microsoft","product":"windows_server_2022"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42978","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42978"},{"url":"https://github.com/advisories/GHSA-mjxj-356g-98wq"}],"sources":{"cve":[{"id":"CVE-2026-42978","title":"Windows Push Notifications Elevation of Privilege Vulnerability","description":"Concurrent execution using shared resource with improper 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using shared resource with improper synchronization ('race condition') in...","description":"Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Push Notifications allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-06-09T18:30:45Z","modified":"2026-06-09T18:30:52Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T15:08:41.598643Z"}],"nvd":[{"id":"CVE-2026-42978","description":"Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Push Notifications allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-06-09T17:17:13.473Z","modified":"2026-07-23T08:10:00.137Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-362","CWE-416"],"updated_at":"2026-11-02T14:12:23.109705Z"}]}}