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TI-2026-21117 Aliases CVE-2026-26123GHSA-5mf6-5mjf-6v7r

Microsoft Authenticator Information Disclosure Vulnerability

Priority LOW 26CWE-939Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from Microsoft.

Summary

Cwe is not in rca categories in Microsoft Authenticator allows an unauthorized attacker to disclose information locally.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00656 51st percentileScored 2026-11-07
Fix Fixed Microsoft Authenticator for Android (Microsoft): 6.2511.7533Microsoft Authenticator for IOS (Microsoft): 6.8.40

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftMicrosoft Authenticator for Android6.0.0 to before 6.2511.75336.2511.7533Patch availableCNA
MicrosoftMicrosoft Authenticator for IOS6.0.0 to before 6.8.406.8.40Patch availableCNA
  • Microsoft Authenticator for Android VendorMicrosoft Affected 6.0.0 to before 6.2511.7533 Fixed in 6.2511.7533 Patch available CNA
  • Microsoft Authenticator for IOS VendorMicrosoft Affected 6.0.0 to before 6.8.40 Fixed in 6.8.40 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:authenticator:*:*:*:*:*:iphone_os:*:*before 6.8.40VulnerableMicrosoft
cpe:2.3:a:microsoft:authenticator:*:*:*:*:*:android:*:*before 6.2511.7533VulnerableMicrosoft
  • cpe:2.3:a:microsoft:authenticator:*:*:*:*:*:iphone_os:*:* Versions before 6.8.40 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:authenticator:*:*:*:*:*:android:*:* Versions before 6.2511.7533 Vulnerable ·Microsoft

Remediation

  • Fix · CNA Microsoft Authenticator for Android (Microsoft) Fixed in 6.2511.7533
  • Fix · CNA Microsoft Authenticator for IOS (Microsoft) Fixed in 6.8.40

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Information Disclosure
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Less Likely
ProductStatusPlan or fix
Microsoft Authenticator for AndroidFixed 6.2511.7533 · Security Update
Microsoft Authenticator for IOSFixed 6.8.40 · Security Update

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-26123
  2. 2026-10-03 Alias added: GHSA-5mf6-5mjf-6v7r
  3. 2026-10-30 EPSS moved to the 50th–90th percentile

References

Patch 1

  • TI-2026-30155 Microsoft Authenticator Information Disclosure Vulnerability CVSS 3.1CRITICAL 9.6
  • TI-2026-55363 Microsoft Authenticator Elevation of Privilege Vulnerability CVSS 3.1HIGH 8.6
  • TI-2024-14150 Microsoft Authenticator Elevation of Privilege Vulnerability CVSS 3.1HIGH 7.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences