CVE-2026-41100
Microsoft 365 Copilot for Android Spoofing Vulnerability
MEDIUM
4.4
CVSS Score
Published: May 12, 2026 at 04:58 PM UTC
Updated: October 26, 2026 at 06:10 PM UTC
6 products affected across 1 vendor365 CopilotExcelWord
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Severity
MEDIUM4.4
Exploit prediction
EPSS 0.2%
SSVC
No known exploit
Description
Improper access control in M365 Copilot allows an authorized attacker to perform spoofing locally.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 16.0.19822.201901.0
Affected range stops below 16.0.19822.20190, so it looks safe — our inference, not a vendor statement
16.0.0.0 ≤ v < 16.0.19822.2019016.0.0.0
Affected range stops below 16.0.19822.20190, so it looks safe — our inference, not a vendor statement
1.0.0 ≤ v < 16.0.19822.201901.0.0
Affected range stops below 16.0.19822.20190, so it looks safe — our inference, not a vendor statement
16.0.1 ≤ v < 16.0.19822.2019016.0.1
Affected range stops below 16.0.19822.20190, so it looks safe — our inference, not a vendor statement
16.0.0.0 ≤ v < 16.0.19822.2019016.0.0.0
Affected range stops below 16.0.19822.20190, so it looks safe — our inference, not a vendor statement
16.0.0.0 ≤ v < 16.0.19822.2019016.0.0.0
Affected range stops below 16.0.19822.20190, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (1)
Vendor AdvisoryPatch
Source: cverecord
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41100SSVC — Action Prioritization
SSVCNo known exploitNot automatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
4.4MEDIUMmicrosoft
Vector?
Quick Info
StatusANALYZED
CWE
CWE-284NVD-CWE-Other
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