{"id":"CVE-2026-80098","title":"Improper verification of cryptographic signature in Copilot Studio allows an unauthorized attacker to elevate privileges over a network.","summary":"Improper verification of cryptographic signature in Copilot Studio allows an unauthorized attacker to elevate privileges over a network.","severity":"critical","cvss":9.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N","cwe":["CWE-347"],"vendor":"microsoft","product":"copilot_studio","affected":["copilot_studio"],"published":"2026-09-03","updated":"2026-09-08","sourceUpdated":"2026-09-08T17:53:07.297","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-80098","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80098","label":"secure@microsoft.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-09-04T00:00:00+00:00"},"epss":0.00334,"epssPercentile":0.26837,"ingestedAt":"2026-09-05T21:45:15.287Z","slug":"CVE-2026-80098","body":"## Overview\n\nImproper verification of cryptographic signature in Copilot Studio allows an unauthorized attacker to elevate privileges over a network.\n\n## Affected\n\n- `copilot_studio`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":51,"depthScoreParts":{"impact":51.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}