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TI-2026-75380 Aliases CVE-2026-80092GHSA-xm6v-frgw-qpq9

Authentication bypass in Microsoft Identity Web enables privilege escalation

Priority LOW 27CWE-302Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
Privilege escalation
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

Microsoft Identity Web versions from 4.16.0 before 4.16.1 and versions before 3.16.0 are affected. Authentication can be bypassed because the product relies on data it assumes is immutable (CWE-302). An authorized remote attacker with low privileges and high attack complexity can escalate privileges over the network.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

Authentication bypass by assumed-immutable data in Microsoft Identity Web allows an authorized attacker to elevate privileges over a network.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00617 49th percentileScored 2026-11-07
Fix Fixed microsoft-identity-web (Microsoft): 4.16.1, 3.16.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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-identity-web>=4.16.0 <4.16.1 to before 4.16.14.16.1Patch availableCNA
Microsoftmicrosoft-identity-web<3.16.0 to before 3.16.03.16.0Patch availableCNA
  • microsoft-identity-web VendorMicrosoft Affected >=4.16.0 <4.16.1 to before 4.16.1 Fixed in 4.16.1 Patch available CNA
  • microsoft-identity-web VendorMicrosoft Affected <3.16.0 to before 3.16.0 Fixed in 3.16.0 Patch available CNA

Remediation

Upgrade microsoft-identity-web to version 4.16.1 if running 4.16.0, and to version 3.16.0 if running a version before 3.16.0.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA microsoft-identity-web (Microsoft) Fixed in 4.16.1
  • Fix · CNA microsoft-identity-web (Microsoft) Fixed in 3.16.0

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Elevation of Privilege
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Less Likely
ProductStatusPlan or fix
microsoft-identity-web v3Fixed 4.16.1 · Security Update
microsoft-identity-web v3Fixed 3.16.0 · Security Update

Timeline

  1. 2026-10-16 Threatist record created from CVE-2026-80092
  2. 2026-10-18 Fix available: Microsoft/[email protected] · CNA
  3. 2026-10-18 CISA SSVC decision points changed
  4. 2026-10-18 Alias added: GHSA-xm6v-frgw-qpq9
  5. 2026-10-20 Fix available: Microsoft/[email protected] · CNA
  6. 2026-10-20 CISA SSVC decision points changed

References

Patch 1

  • TI-2026-42212 Microsoft SharePoint Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-37256 Microsoft SharePoint Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-26194 Windows Internet Key Exchange (IKE) Service Extensions Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-16982 Microsoft SharePoint Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-36863 Windows Server Update Service (WSUS) Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-33671 Microsoft SharePoint Server Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
See all 18045 →

Sources

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