{"id":"CVE-2026-42978","title":"Windows Push Notifications Elevation of Privilege Vulnerability","summary":"Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Push Notifications allows an authorized attacker to elevate privileges locally.","severity":"high","cvss":7.8,"cvssVector":"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","cvssSource":"cna","cwe":["CWE-362","CWE-416"],"vendor":"Microsoft","product":"Windows 10 Version 1809","affected":["windows_10_version_1809 >= 10.0.17763.0 < 10.0.17763.8880","windows_10_version_21h2 >= 10.0.19044.0 < 10.0.19044.7417","windows_10_version_22h2 >= 10.0.19045.0 < 10.0.19045.7417","windows_11_version_23h2 >= 10.0.22631.0 < 10.0.22631.7219","windows_11_version_23h2 >= 10.0.22631.0 < 10.0.22631.7219","windows_11_version_24h2 >= 10.0.26100.0 < 10.0.26100.8655","windows_11_version_25h2 >= 10.0.26200.0 < 10.0.26200.8655","windows_11_version_26h1 >= 10.0.28000.0 < 10.0.28000.2269","windows_server_2019 >= 10.0.17763.0 < 10.0.17763.8880","windows_server_2019_server_core_installation >= 10.0.17763.0 < 10.0.17763.8880","windows_server_2022 >= 10.0.20348.0 < 10.0.20348.5256","windows_server_2025 >= 10.0.26100.0 < 10.0.26100.32995","windows_server_2025_server_core_installation >= 10.0.26100.0 < 10.0.26100.32995"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-06-10T03:55:44.721391Z"},"exploitAvailable":true,"published":"2026-06-09","updated":"2026-09-24","sourceUpdated":"2026-09-24T13:45:04.744Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-42978","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42978","label":"Windows Push Notifications Elevation of Privilege Vulnerability"}],"tags":["cve.org","exploit-available"],"epss":0.00246,"epssPercentile":0.16135,"exploits":{"github":5,"githubRepos":["https://github.com/SyntaxMethod/CVE-2026-42978-PoC-Research","https://github.com/grizzzer/CVE-2026-42978-PoC-Research","https://github.com/ZeroDayEvil/CVE-2026-42978-PoC-Research"],"checkedAt":"2026-09-24T14:44:56.016Z"},"ingestedAt":"2026-09-24T14:44:21.368Z","slug":"CVE-2026-42978","body":"## Overview\n\nConcurrent execution using shared resource with improper synchronization ('race condition') in Windows Push Notifications allows an authorized attacker to elevate privileges locally.\n\n## Affected\n\n- `windows_10_version_1809 >= 10.0.17763.0 < 10.0.17763.8880`\n- `windows_10_version_21h2 >= 10.0.19044.0 < 10.0.19044.7417`\n- `windows_10_version_22h2 >= 10.0.19045.0 < 10.0.19045.7417`\n- `windows_11_version_23h2 >= 10.0.22631.0 < 10.0.22631.7219`\n- `windows_11_version_23h2 >= 10.0.22631.0 < 10.0.22631.7219`\n- `windows_11_version_24h2 >= 10.0.26100.0 < 10.0.26100.8655`\n- `windows_11_version_25h2 >= 10.0.26200.0 < 10.0.26200.8655`\n- `windows_11_version_26h1 >= 10.0.28000.0 < 10.0.28000.2269`\n- `windows_server_2019 >= 10.0.17763.0 < 10.0.17763.8880`\n- `windows_server_2019_server_core_installation >= 10.0.17763.0 < 10.0.17763.8880`\n- `windows_server_2022 >= 10.0.20348.0 < 10.0.20348.5256`\n- `windows_server_2025 >= 10.0.26100.0 < 10.0.26100.32995`\n- `windows_server_2025_server_core_installation >= 10.0.26100.0 < 10.0.26100.32995`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":55,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[]}