Microsoft Authenticator vulnerabilities

4 CVEs affecting Microsoft Authenticator, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2026-80097, published 2026-09-08.

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Known exploited (CISA KEV) first, then by EPSS exploit probability.

• CVE-2024-21390, published 2024-03-12. High severity, CVSS 7.1. EPSS: 1.3% chance of exploitation in the next 30 days. Microsoft Authenticator Elevation of Privilege Vulnerability
• CVE-2026-41615, published 2026-05-14. High severity, CVSS 7.4. EPSS: 1.1% chance of exploitation in the next 30 days. Exposure of sensitive information to an unauthorized actor in Microsoft Authenticator allows an unauthorized attacker to disclose information over a network.
• CVE-2026-26123, published 2026-03-10. Medium severity, CVSS 5.5. EPSS: 0.6% chance of exploitation in the next 30 days. Cwe is not in rca categories in Microsoft Authenticator allows an unauthorized attacker to disclose information locally.
• CVE-2026-80097, published 2026-09-08. High severity, CVSS 8.6. EPSS: 0.4% chance of exploitation in the next 30 days. Improper authentication in Microsoft Authenticator allows an unauthorized attacker to elevate privileges locally.