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Vulnerability record · CVE-2026-45480 · published 19 June 2026

CVE-2026-45480: Microsoft azure active directory improper authentication vulnerability

Microsoft · Azure Active Directory

Improper authentication in Azure Active Directory allows an unauthorized attacker to elevate privileges over a network.

10.0 CVSS 3.1 Critical EPSS 0.90% · top 41.9% CWE-287 · Improper authentication
10.0CVSS 3.1 base score
0.90%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
24 Jun 2026Last modified by NVD

Description

Improper authentication in Azure Active Directory allows an unauthorized attacker to elevate privileges over a network.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45480 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.9CVE-2026-50481Microsoft azure active directory vulnerabilityModification of assumed-immutable data (maid) in Azure Active Directory allows an authorized attacker to elevate privileges over a network.EPSS 0.82%8.1CVE-2021-42306Microsoft azure active directory insufficiently protected credentials vulnerabilityAn information disclosure vulnerability manifests when a user or an application uploads unprotected private key data as part of an authentication cer…EPSS 3.3%7.5CVE-2026-50652Microsoft .net framework deserialization of untrusted data vulnerabilityDeserialization of untrusted data in Azure Active Directory allows an unauthorized attacker to deny service over a network.EPSS 1.7%7.5CVE-2026-50653Microsoft .net framework uncontrolled resource consumption vulnerabilityLoop with unreachable exit condition ('infinite loop') in Azure Active Directory allows an unauthorized attacker to deny service over a network.EPSS 1.2%6.8CVE-2024-21381Microsoft azure active directory cross-site request forgery vulnerabilityMicrosoft Azure Active Directory B2C Spoofing VulnerabilityEPSS 0.42%7.5CVE-2026-42018JFrog Artifactory improper authentication leaks anonymous tokenJFrog Artifactory can return an internal anonymous-user token to an unauthenticated caller even when anonymous access is disabled. Because the token …KEVEPSS 9.8%analysed9.8CVE-2026-82329JFrog Artifactory improper authentication allows admin takeoverJFrog Artifactory contains an improper authentication weakness (CWE-287) that, under default configuration, may let an unauthenticated attacker with …KEVEPSS 14%analysed8.8CVE-2026-59822LiteLLM MCP endpoint auth bypass via OAuth2 passthrough fallbackLiteLLM's MCP Streamable HTTP endpoint, prior to 1.84.0, let an unauthenticated attacker send a fabricated Authorization header that triggered an OAu…KEVEPSS 0.84%analysed

Source: NIST National Vulnerability Database (record CVE-2026-45480), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.