CVE-2026-41090Network attack vector

Data tampering via command injection

Published May 22, 2026 · Updated May 22, 2026

Command injection in the Microsoft 365 Copilot app for iOS allows remote attackers to modify data via network input after user action. Microsoft has not published the affected command-processing locus or how untrusted input reaches a command interpreter. Exploitation requires user interaction and can disclose or modify data, but Microsoft reports no availability impact.

CVSS severity9.3
Critical
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in the Microsoft 365 Copilot app for iOS allows remote attackers to modify data via network input after user action. Microsoft has not published the affected command-processing locus or how untrusted input reaches a command interpreter. Exploitation requires user interaction and can disclose or modify data, but Microsoft reports no availability impact.

The record

CVE
CVE-2026-41090
Published
May 22, 2026
Updated
May 22, 2026
Vendor
Microsoft
Product
Microsoft 365 Copilot app for iOS
Classifications
CWE-77
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 22, 2026CVE publishedPublication date reported by the CVE source.
  2. May 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=-

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Microsoft 365 Copilot app for iOSversion=-

Published CVSS scores

9.3Microsoft CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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