{"id":"CVE-2026-20833","aliases":["EUVD-2026-2153","GHSA-qvf8-2q87-3fcr"],"status":"published","title":"Windows Kerberos Information Disclosure Vulnerability","description":"Use of a broken or risky cryptographic algorithm in Windows Kerberos allows an authorized attacker to disclose information locally.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00532,"percentile":0.45299,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-327"],"published":"2026-01-13T17:56:23Z","modified":"2026-07-30T20:46:40Z","exploits":[{"source":"pocgithub","id":"AlMarWorld/KerberosAudit-PS","title":"AlMarWorld/KerberosAudit-PS","date":"2026-07-16","url":"https://github.com/AlMarWorld/KerberosAudit-PS"},{"source":"pocgithub","id":"v-jfanca/cve-2026-20833-rc4-kerberos","title":"v-jfanca/cve-2026-20833-rc4-kerberos","date":"2026-03-15","url":"https://github.com/v-jfanca/cve-2026-20833-rc4-kerberos"}],"products":[{"vendor":"microsoft","product":"windows server 2008 r2 service pack 1"},{"vendor":"microsoft","product":"windows server 2008 r2 service pack 1 (server core installation)"},{"vendor":"microsoft","product":"windows server 2008 service pack 2"},{"vendor":"microsoft","product":"windows server 2008 service pack 2 (server core installation)"},{"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_server_2008"},{"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-2026-20833","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-20833"},{"url":"https://github.com/advisories/GHSA-qvf8-2q87-3fcr"}],"sources":{"cve":[{"id":"CVE-2026-20833","title":"Windows Kerberos Information Disclosure Vulnerability","description":"Use of a broken or risky cryptographic algorithm in Windows Kerberos allows an authorized attacker to disclose information locally.","status":"published","published":"2026-01-13T17:56:23.072Z","modified":"2026-07-30T20:46:40.227Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"cwes":["CWE-327"],"updated_at":"2026-11-02T13:35:33.380441Z"}],"euvd":[{"id":"EUVD-2026-2153","description":"Use of a broken or risky cryptographic algorithm in Windows Kerberos allows an authorized attacker to disclose information locally.","status":"published","published":"2026-01-13T17:56:23Z","modified":"2026-07-30T20:46:40Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-02T18:02:27.233735Z"}],"ghsa":[{"id":"GHSA-qvf8-2q87-3fcr","title":"Use of a broken or risky cryptographic algorithm in Windows Kerberos allows an authorized...","description":"Use of a broken or risky cryptographic algorithm in Windows Kerberos allows an authorized attacker to disclose information locally.","status":"published","published":"2026-01-13T18:31:09Z","modified":"2026-01-13T18:31:17Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-327"],"updated_at":"2026-11-02T15:05:35.156514Z"}],"nvd":[{"id":"CVE-2026-20833","description":"Use of a broken or risky cryptographic algorithm in Windows Kerberos allows an authorized attacker to disclose information locally.","status":"published","published":"2026-01-13T18:16:11.32Z","modified":"2026-06-17T10:17:52.64Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-327"],"updated_at":"2026-11-02T14:12:03.683495Z"}]}}