{"id":"CVE-2026-62911","aliases":["EUVD-2026-56688","GHSA-hjp7-hfwh-7664"],"status":"published","title":"Microsoft Exchange Server Elevation of Privilege Vulnerability","description":"Authentication bypass by capture-replay in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.","severity":{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00694,"percentile":0.53422,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-294"],"published":"2026-08-11T17:06:27Z","modified":"2026-10-30T17:22:14Z","exploits":[{"source":"pocgithub","id":"hypnguyen1209/CVE-2026-62911","title":"hypnguyen1209/CVE-2026-62911","date":"2026-08-22","url":"https://github.com/hypnguyen1209/CVE-2026-62911"},{"source":"pocgithub","id":"che3axujnya/cve-2026-62911","title":"che3axujnya/cve-2026-62911","date":"2026-10-20","url":"https://github.com/che3axujnya/cve-2026-62911"},{"source":"pocgithub","id":"c5z54/cve-2026-62911-poc","title":"c5z54/cve-2026-62911-poc","date":"2026-11-02","url":"https://github.com/c5z54/cve-2026-62911-poc"}],"products":[{"vendor":"microsoft","product":"exchange_server"},{"vendor":"microsoft","product":"exchange_server_subscription_edition"},{"vendor":"microsoft","product":"microsoft exchange server 2016 cumulative update 23"},{"vendor":"microsoft","product":"microsoft exchange server 2019 cumulative update 14"},{"vendor":"microsoft","product":"microsoft exchange server 2019 cumulative update 15"},{"vendor":"microsoft","product":"microsoft exchange server subscription edition rtm"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62911","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://github.com/hypnguyen1209/CVE-2026-62911","tags":["exploit"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-62911"},{"url":"https://github.com/advisories/GHSA-hjp7-hfwh-7664"}],"sources":{"cve":[{"id":"CVE-2026-62911","title":"Microsoft Exchange Server Elevation of Privilege Vulnerability","description":"Authentication bypass by capture-replay in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.","status":"published","published":"2026-08-11T17:06:27.357Z","modified":"2026-11-10T22:00:16.101Z","cvss":[{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-294"],"updated_at":"2026-11-10T23:49:30.334266Z"}],"euvd":[{"id":"EUVD-2026-56688","description":"Authentication bypass by capture-replay in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.","status":"published","published":"2026-08-11T17:06:27Z","modified":"2026-11-10T22:00:16Z","cvss":[{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-10T23:24:16.815365Z"}],"ghsa":[{"id":"GHSA-hjp7-hfwh-7664","title":"Authentication bypass by capture-replay in Microsoft Exchange Server allows an authorized...","description":"Authentication bypass by capture-replay in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.","status":"published","published":"2026-08-11T18:31:29Z","modified":"2026-09-01T15:30:53Z","cvss":[{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-294"],"updated_at":"2026-11-02T15:11:12.60039Z"}],"nvd":[{"id":"CVE-2026-62911","description":"Authentication bypass by capture-replay in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.","status":"published","published":"2026-08-11T17:18:45.073Z","modified":"2026-10-14T22:10:00.21Z","cvss":[{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-294"],"updated_at":"2026-11-02T14:12:36.499002Z"}]}}