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TI-2026-21127 Aliases CVE-2026-26134GHSA-46v7-2rrf-mc24

Microsoft Office Elevation of Privilege Vulnerability

Priority LOW 36CWE-190Published · Updated

Key facts

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

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

Summary

Integer overflow or wraparound in Microsoft Office allows an authorized attacker to elevate privileges locally.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00377 31st percentileScored 2026-11-07
Fix Fixed Microsoft Office for Android (Microsoft): 16.0.19822.20000

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 Office for Android16.0.1 to before 16.0.19822.2000016.0.19822.20000Patch availableCNA
  • Microsoft Office for Android VendorMicrosoft Affected 16.0.1 to before 16.0.19822.20000 Fixed in 16.0.19822.20000 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:365_copilot:*:*:*:*:*:android:*:*before 16.0.19822.20000VulnerableMicrosoft
  • cpe:2.3:a:microsoft:365_copilot:*:*:*:*:*:android:*:* Versions before 16.0.19822.20000 Vulnerable ·Microsoft

Remediation

  • Fix · CNA Microsoft Office for Android (Microsoft) Fixed in 16.0.19822.20000

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 Office for AndroidFixed 16.0.19822.20000 · Security Update

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-26134
  2. 2026-10-03 Alias added: GHSA-46v7-2rrf-mc24

References

Patch 1

  • TI-2025-37796 GDI+ Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2025-23775 M365 Copilot Information Disclosure Vulnerability CVSS 3.1CRITICAL 9.3
  • TI-2025-33667 GDI+ Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2021-19684 Microsoft Office app Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.6
  • TI-2026-37251 Microsoft M365 Copilot Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.9
  • TI-2026-39054 M365 Copilot Information Disclosure Vulnerability CVSS 3.1CRITICAL 9.8
See all 54 →

Sources

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