{"id":"CVE-2026-24294","title":"Improper authentication in Windows SMB Server allows an authorized attacker to elevate privileges locally.","summary":"Improper authentication in Windows SMB Server allows an authorized attacker to elevate privileges locally.","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-287"],"vendor":"microsoft","product":"windows_10_1607","affected":["windows_10_1607 < 10.0.14393.8957","windows_10_1809 < 10.0.17763.8511","windows_10_21h2 < 10.0.19044.7058","windows_10_22h2 < 10.0.19045.7058","windows_11_23h2 < 10.0.22631.6783","windows_11_24h2 < 10.0.26100.7979","windows_11_25h2 < 10.0.26200.7979","windows_11_26h1 < 10.0.28000.1719","windows_server_2012","windows_server_2012 = r2","windows_server_2016 < 10.0.14393.8957","windows_server_2019 < 10.0.17763.8511","windows_server_2022 < 10.0.20348.4830","windows_server_2022_23h2 < 10.0.25398.2207","windows_server_2025 < 10.0.26100.32463"],"patched":["windows_10_1607 10.0.14393.8957","windows_10_1809 10.0.17763.8511","windows_10_21h2 10.0.19044.7058","windows_10_22h2 10.0.19045.7058","windows_11_23h2 10.0.22631.6783","windows_11_24h2 10.0.26100.7979","windows_11_25h2 10.0.26200.7979","windows_11_26h1 10.0.28000.1719","windows_server_2016 10.0.14393.8957","windows_server_2019 10.0.17763.8511","windows_server_2022 10.0.20348.4830","windows_server_2022_23h2 10.0.25398.2207","windows_server_2025 10.0.26100.32463"],"published":"2026-03-10","updated":"2026-06-30","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-24294","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-24294","label":"secure@microsoft.com"},{"url":"https://www.vicarius.io/vsociety/posts/cve-2026-24294-detection-script-improper-authentication-vulnerability-in-windows-smb-server","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.vicarius.io/vsociety/posts/cve-2026-24294-mitigation-script-improper-authentication-vulnerability-in-windows-smb-server","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/0xNDI/CVE-2026-24294","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","exploit-available"],"epss":0.04671,"epssPercentile":0.91364,"ingestedAt":"2026-07-01T03:50:34.507Z","exploits":{"github":1,"githubRepos":["https://github.com/0xNDI/CVE-2026-24294"],"checkedAt":"2026-09-24T07:53:01.064Z"},"exploitAvailable":true,"slug":"CVE-2026-24294","body":"## Overview\n\nImproper authentication in Windows SMB Server allows an authorized attacker to elevate privileges locally.\n\n## Affected\n\n- `windows_10_1607 < 10.0.14393.8957`\n- `windows_10_1809 < 10.0.17763.8511`\n- `windows_10_21h2 < 10.0.19044.7058`\n- `windows_10_22h2 < 10.0.19045.7058`\n- `windows_11_23h2 < 10.0.22631.6783`\n- `windows_11_24h2 < 10.0.26100.7979`\n- `windows_11_25h2 < 10.0.26200.7979`\n- `windows_11_26h1 < 10.0.28000.1719`\n- `windows_server_2012`\n- `windows_server_2012 = r2`\n- `windows_server_2016 < 10.0.14393.8957`\n- `windows_server_2019 < 10.0.17763.8511`\n- `windows_server_2022 < 10.0.20348.4830`\n- `windows_server_2022_23h2 < 10.0.25398.2207`\n- `windows_server_2025 < 10.0.26100.32463`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `windows_10_1607 10.0.14393.8957`\n- `windows_10_1809 10.0.17763.8511`\n- `windows_10_21h2 10.0.19044.7058`\n- `windows_10_22h2 10.0.19045.7058`\n- `windows_11_23h2 10.0.22631.6783`\n- `windows_11_24h2 10.0.26100.7979`\n- `windows_11_25h2 10.0.26200.7979`\n- `windows_11_26h1 10.0.28000.1719`\n- `windows_server_2016 10.0.14393.8957`\n- `windows_server_2019 10.0.17763.8511`\n- `windows_server_2022 10.0.20348.4830`\n- `windows_server_2022_23h2 10.0.25398.2207`\n- `windows_server_2025 10.0.26100.32463`","depth":"midnight","depthScore":56,"depthScoreParts":{"impact":42.9,"likelihood":0.9,"exploitation":12,"ransomware":0},"changes":[{"seq":5029,"id":"CVE-2026-24294","ts":1788887229691,"field":"exploit_available","old":"false","new":"true"},{"seq":3912,"id":"CVE-2026-24294","ts":1788886360402,"field":"exploit_available","old":"true","new":"false"},{"seq":2734,"id":"CVE-2026-24294","ts":1788883026238,"field":"exploit_available","old":"false","new":"true"},{"seq":1763,"id":"CVE-2026-24294","ts":1788882430197,"field":"exploit_available","old":"true","new":"false"},{"seq":869,"id":"CVE-2026-24294","ts":1788881863195,"field":"exploit_available","old":"false","new":"true"}]}