{"id":"CVE-2026-26137","aliases":["EUVD-2026-13184","GHSA-88qf-p934-h9qg"],"status":"published","title":"Microsoft Exchange Elevation of Privilege Vulnerability","description":"Server-side request forgery (ssrf) in Microsoft Exchange allows an authorized attacker to elevate privileges over a network.","severity":{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L/E:U/RL:O/RC:C","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.0056,"percentile":0.47087,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-918"],"published":"2026-03-19T21:06:26Z","modified":"2026-06-19T18:18:13Z","products":[{"vendor":"","product":"microsoft exchange online"},{"vendor":"microsoft","product":"365_copilot_chat"},{"vendor":"microsoft","product":"microsoft exchange online"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26137","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-26137"},{"url":"https://github.com/advisories/GHSA-88qf-p934-h9qg"}],"sources":{"cve":[{"id":"CVE-2026-26137","title":"Microsoft Exchange Elevation of Privilege Vulnerability","description":"Server-side request forgery (ssrf) in Microsoft Exchange allows an authorized attacker to elevate privileges over a network.","status":"published","published":"2026-03-19T21:06:26.05Z","modified":"2026-06-19T18:18:13.383Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L/E:U/RL:O/RC:C","level":"critical","assessor":"cna"}],"cwes":["CWE-918"],"updated_at":"2026-11-02T13:38:32.13011Z"}],"euvd":[{"id":"EUVD-2026-13184","description":"Server-side request forgery (ssrf) in Microsoft Exchange allows an authorized attacker to elevate privileges over a network.","status":"published","published":"2026-03-19T21:06:26Z","modified":"2026-06-19T18:18:13Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L/E:U/RL:O/RC:C","level":"critical"}],"updated_at":"2026-11-02T18:20:35.26548Z"}],"ghsa":[{"id":"GHSA-88qf-p934-h9qg","title":"Server-side request forgery (ssrf) in Microsoft 365 Copilot's Business Chat allows an authorized...","description":"Server-side request forgery (ssrf) in Microsoft 365 Copilot's Business Chat allows an authorized attacker to elevate privileges over a network.","status":"published","published":"2026-03-19T21:30:24Z","modified":"2026-03-19T21:30:31Z","cvss":[{"version":"3.1","score":8.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L","level":"high"}],"cwes":["CWE-918"],"updated_at":"2026-11-02T15:06:43.427844Z"}],"nvd":[{"id":"CVE-2026-26137","description":"Server-side request forgery (ssrf) in Microsoft Exchange allows an authorized attacker to elevate privileges over a network.","status":"published","published":"2026-03-19T21:17:08.05Z","modified":"2026-06-17T10:25:47.537Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L","level":"critical","assessor":"secondary"}],"cwes":["CWE-918"],"updated_at":"2026-11-02T14:12:09.735529Z"}]}}