CVE-2026-41614

Local spoofing via undisclosed access-control failure

Published May 12, 2026 · Updated May 12, 2026

Improper access control in Microsoft 365 Copilot for Desktop before 19.2604.43111.0 allows local users to perform spoofing. Microsoft has not disclosed the affected component or the access-control operation that mishandles local input. Exploitation requires local execution but no account privileges or user interaction, and the published assessment limits the consequence to confidentiality loss.

CVSS severity6.2
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Microsoft 365 Copilot for Desktop before 19.2604.43111.0 allows local users to perform spoofing. Microsoft has not disclosed the affected component or the access-control operation that mishandles local input. Exploitation requires local execution but no account privileges or user interaction, and the published assessment limits the consequence to confidentiality loss.

The record

CVE
CVE-2026-41614
Published
May 12, 2026
Updated
May 12, 2026
Vendor
Microsoft
Product
Microsoft 365 Copilot app for desktop
Classifications
CWE-284
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 12, 2026CVE publishedPublication date reported by the CVE source.
  2. May 12, 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=1.0.0 <19.2604.43111.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Microsoft · Microsoft 365 Copilot app for desktopversion=1.0.0 <19.2604.43111.0

Published CVSS scores

6.2MicrosoftCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.4MicrosoftCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-284Improper Access Control

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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