{"id":"CVE-2026-54990","title":"Remote Desktop Client Remote Code Execution Vulnerability","summary":"Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.","severity":"critical","cvss":9.8,"cvssVector":"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","cvssSource":"cna","cwe":["CWE-122"],"vendor":"Microsoft","product":"Windows 11 Version 24H2","affected":["windows_11_version_24h2 >= 10.0.26100.0 < 10.0.26100.8875","windows_11_version_25h2 >= 10.0.26200.0 < 10.0.26200.8875","windows_11_version_26h1 >= 10.0.28000.0 < 10.0.28000.2525","windows_server_2025 >= 10.0.26100.0 < 10.0.26100.33158","windows_server_2025_server_core_installation >= 10.0.26100.0 < 10.0.26100.33158"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-07-15T03:56:03.986691Z"},"published":"2026-07-14","updated":"2026-09-17","sourceUpdated":"2026-09-17T22:28:48.475Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-54990","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54990","label":"Remote Desktop Client Remote Code Execution Vulnerability"}],"tags":["cve.org"],"epss":0.00819,"epssPercentile":0.55727,"ingestedAt":"2026-09-08T17:06:31.930Z","slug":"CVE-2026-54990","body":"## Overview\n\nHeap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.\n\n## Affected\n\n- `windows_11_version_24h2 >= 10.0.26100.0 < 10.0.26100.8875`\n- `windows_11_version_25h2 >= 10.0.26200.0 < 10.0.26200.8875`\n- `windows_11_version_26h1 >= 10.0.28000.0 < 10.0.28000.2525`\n- `windows_server_2025 >= 10.0.26100.0 < 10.0.26100.33158`\n- `windows_server_2025_server_core_installation >= 10.0.26100.0 < 10.0.26100.33158`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}