{"@odata.context":"https://api.msrc.microsoft.com/sug/v2.0/sugodata/v2.0/en-US/$metadata#vulnerability/$entity","id":"00000000-0000-0000-0000-000077fcbf80","releaseDate":"2026-11-10T08:00:00-08:00","cveNumber":"CVE-2026-118746","cveTitle":".NET Security Feature Bypass Vulnerability","releaseNumber":"2026-Nov","vulnType":"Security Vulnerability","latestRevisionDate":"2026-11-11T08:00:00-08:00","description":"<p>Not failing securely ('failing open') in .NET allows an unauthorized attacker to bypass a security feature over a network.</p>\n","cweList":["CWE-636: Not Failing Securely ('Failing Open')"],"cweDetailsListForSearch":["cwe: CWE-636: Not Failing Securely ('Failing Open')","cweUrl: https://cwe.mitre.org/data/definitions/636.html"],"unformattedDescription":"<p>Not failing securely ('failing open') in .NET allows an unauthorized attacker to bypass a security feature over a network.</p>","mitreText":"CVE-2026-118746","mitreUrl":"https://www.cve.org/CVERecord?id=CVE-2026-118746","publiclyDisclosed":"No","exploited":"No","latestSoftwareReleaseId":2,"latestSoftwareRelease":"Exploitation Less Likely","olderSoftwareReleaseId":0,"denialOfService":"N/A","tag":".NET","issuingCna":"Microsoft","issuingCnaId":100000001,"severityId":100000001,"severity":"Important","impactId":100000007,"impact":"Security Feature Bypass","langCode":"en-US","baseScore":"6.8","temporalScore":"5.9","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C","vectorStringSource":"Microsoft","isMariner":false,"customerActionRequired":true,"customerActionRequiredId":1,"cweDetailsList":[{"keys":["cwe","cweUrl"],"values":["CWE-636: Not Failing Securely ('Failing Open')","https://cwe.mitre.org/data/definitions/636.html"]}],"articles":[{"title":"Authentication Bypass","articleType":"FAQ","description":"<p><strong>What kind of security feature could be bypassed by successfully exploiting this vulnerability?</strong></p>\n<p>The authentication feature could be bypassed as this vulnerability allows impersonation.</p>\n","ordinal":10000},{"articleType":"FAQ","description":"<p><strong>According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?</strong></p>\n<p>The attacker must inject themselves into the logical network path between the target and the resource requested by the victim to read or modify network communications. This is called a machine-in-the-middle (MITM) attack.</p>\n","ordinal":10000},{"title":".NET Security Feature Bypass Vulnerability","articleType":"100000000","description":"<p>Not failing securely ('failing open') in .NET allows an unauthorized attacker to bypass a security feature over a network.</p>\n","ordinal":10000},{"title":".NET Security Feature Bypass Vulnerability","articleType":"100000000","description":"<p>Not failing securely ('failing open') in .NET allows an unauthorized attacker to bypass a security feature over a network.</p>\n","ordinal":10000}],"revisions":[{"cveNumber":"CVE-2026-118746","version":2,"revisionDate":"2026-11-11T08:00:00-08:00","initialDate":"0001-01-01T00:00:00Z","description":"<p>Changes made to the security updates links and information.  This is an informational change only.</p>\n","unformattedDescription":"Changes made to the security updates links and information.  This is an informational change only.","notificationNeeded":false,"notificationSent":false,"sourceId":"9d8a49a5-f1dd-f111-84e8-6045bd0a04e8"},{"cveNumber":"CVE-2026-118746","version":1,"revisionDate":"2026-11-10T08:00:00-08:00","initialDate":"0001-01-01T00:00:00Z","description":"<p>Information published.</p>\n","unformattedDescription":"Information published.","notificationNeeded":false,"notificationSent":false,"sourceId":"131b53f8-d6d3-f111-a059-7ced8d6e4554"}]}