{"id":"CVE-2026-54990","aliases":["EUVD-2026-44001","GHSA-q6cx-465r-334m"],"status":"published","title":"Remote Desktop Client Remote Code Execution Vulnerability","description":"Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00819,"percentile":0.57533,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-122"],"published":"2026-07-14T17:04:44Z","modified":"2026-11-10T22:35:20Z","products":[{"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 2025"},{"vendor":"microsoft","product":"windows server 2025 (server core installation)"},{"vendor":"microsoft","product":"windows_11_24h2"},{"vendor":"microsoft","product":"windows_11_25h2"},{"vendor":"microsoft","product":"windows_11_26h1"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54990","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54990"},{"url":"https://github.com/advisories/GHSA-q6cx-465r-334m"}],"sources":{"cve":[{"id":"CVE-2026-54990","title":"Remote Desktop Client Remote Code Execution Vulnerability","description":"Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-07-14T17:04:44.1Z","modified":"2026-11-10T22:35:20.117Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"critical","assessor":"cna"}],"cwes":["CWE-122"],"updated_at":"2026-11-10T23:49:29.024872Z"}],"euvd":[{"id":"EUVD-2026-44001","description":"Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-07-14T17:04:44Z","modified":"2026-11-10T22:35:20Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"critical"}],"updated_at":"2026-11-10T23:24:15.503335Z"}],"ghsa":[{"id":"GHSA-q6cx-465r-334m","title":"Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute...","description":"Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-07-14T18:32:08Z","modified":"2026-07-14T18:32:12Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T15:09:28.885137Z"}],"nvd":[{"id":"CVE-2026-54990","description":"Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.","status":"published","published":"2026-07-14T17:17:06.603Z","modified":"2026-07-22T16:18:16.317Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T14:12:29.489525Z"}]}}