{"id":"CVE-2026-77903","title":"Authentication bypass by spoofing in Microsoft Dataverse allows an unauthorized attacker to elevate privileges over a network.","summary":"Authentication bypass by spoofing in Microsoft Dataverse allows an unauthorized attacker to elevate privileges over a network.","severity":"critical","cvss":9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","cwe":["CWE-290"],"vendor":"Microsoft","product":"Microsoft Dataverse","affected":["dataverse -"],"published":"2026-09-17","updated":"2026-09-19","sourceUpdated":"2026-09-19T04:17:56.510","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-77903","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77903","label":"secure@microsoft.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-18T14:11:57.707545Z"},"epss":0.00381,"epssPercentile":0.31834,"ingestedAt":"2026-09-17T23:31:20.686Z","slug":"CVE-2026-77903","body":"## Overview\n\nAuthentication bypass by spoofing in Microsoft Dataverse allows an unauthorized attacker to elevate privileges over a network.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":50,"depthScoreParts":{"impact":49.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}