{"id":"CVE-2026-21533","aliases":["EUVD-2026-7343","GHSA-qppx-835v-jvwp"],"status":"published","title":"Windows Remote Desktop Services Elevation of Privilege Vulnerability","description":"Improper privilege management in Windows Remote Desktop allows an authorized attacker to elevate privileges locally.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.04335,"percentile":0.91331,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":true,"fix_available":false},"cwes":["CWE-269"],"published":"2026-02-10T17:51:26Z","modified":"2026-08-19T16:25:56Z","kev":{"date_added":"2026-02-10","due_date":"2026-03-03","required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2026-02-10"},{"source":"kev","since":"2026-02-10"}],"exploits":[{"source":"pocgithub","id":"Pairs34/RDPVulnarableCheck","title":"Pairs34/RDPVulnarableCheck","date":"2026-02-11","url":"https://github.com/Pairs34/RDPVulnarableCheck"},{"source":"pocgithub","id":"fevar54/CVE-2026-21533_Scanner.py","title":"fevar54/CVE-2026-21533_Scanner.py","date":"2026-03-09","url":"https://github.com/fevar54/CVE-2026-21533_Scanner.py"}],"products":[{"vendor":"microsoft","product":"windows"},{"vendor":"microsoft","product":"windows 10 version 1607"},{"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 22h3"},{"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 2012"},{"vendor":"microsoft","product":"windows server 2012 (server core installation)"},{"vendor":"microsoft","product":"windows server 2012 r2"},{"vendor":"microsoft","product":"windows server 2012 r2 (server core installation)"},{"vendor":"microsoft","product":"windows server 2016"},{"vendor":"microsoft","product":"windows server 2016 (server core installation)"},{"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 2022, 23h2 edition (server core installation)"},{"vendor":"microsoft","product":"windows server 2025"},{"vendor":"microsoft","product":"windows server 2025 (server core installation)"},{"vendor":"microsoft","product":"windows_10_1607"},{"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_server_2012"},{"vendor":"microsoft","product":"windows_server_2016"},{"vendor":"microsoft","product":"windows_server_2019"},{"vendor":"microsoft","product":"windows_server_2022"},{"vendor":"microsoft","product":"windows_server_2022_23h2"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21533","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21533","tags":["government-resource","US Government Resource"]},{"url":"https://www.vicarius.io/vsociety/posts/cve-2026-21533-detection-script-privilege-escalation-vulnerability-in-windows-remote-desktop","tags":["Third Party Advisory"]},{"url":"https://www.vicarius.io/vsociety/posts/cve-2026-21533-mitigation-script-privilege-escalation-vulnerability-in-windows-remote-desktop","tags":["Mitigation","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-21533"},{"url":"https://github.com/advisories/GHSA-qppx-835v-jvwp"}],"sources":{"cve":[{"id":"CVE-2026-21533","title":"Windows Remote Desktop Services Elevation of Privilege Vulnerability","description":"Improper privilege management in Windows Remote Desktop allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-02-10T17:51:26.211Z","modified":"2026-08-19T16:25:56.552Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T13:41:42.05254Z"}],"euvd":[{"id":"EUVD-2026-7343","description":"Improper privilege management in Windows Remote Desktop allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-02-10T17:51:26Z","modified":"2026-08-19T16:25:56Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C","level":"high"}],"exploited_since":"2026-02-10","updated_at":"2026-11-02T18:01:44.172516Z"}],"ghsa":[{"id":"GHSA-qppx-835v-jvwp","title":"Improper privilege management in Windows Remote Desktop allows an authorized attacker to elevate...","description":"Improper privilege management in Windows Remote Desktop allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-02-10T18:30:42Z","modified":"2026-03-27T21:32:39Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T15:06:54.610516Z"}],"kev":[{"id":"CVE-2026-21533","title":"Microsoft Windows Improper Privilege Management Vulnerability","description":"Microsoft Windows Remote Desktop Services contains an improper privilege management vulnerability that could allow an authorized attacker to elevate privileges locally.","cwes":["CWE-269"],"kev":{"date_added":"2026-02-10","due_date":"2026-03-03","required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:15.999436Z"}],"nvd":[{"id":"CVE-2026-21533","description":"Improper privilege management in Windows Remote Desktop allows an authorized attacker to elevate privileges locally.","status":"published","published":"2026-02-10T18:16:35.79Z","modified":"2026-06-17T10:18:47.933Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T14:12:05.908608Z"}]}}
