CVE-2026-55145: Outlook Copilot Tampering Vulnerability

Published Jul 14, 2026
·
Updated

Improper neutralization of special elements used in a command ('command injection') in Outlook Copilot allows an authorized attacker to perform tampering over a network.

Affected Software

3 affected components
Microsoft Outlook Copilot
Microsoft Copilot
Microsoft Copilot

Event History

Jul 14, 2026
CVE Published
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·02:00 PM
Affected Software
Updated
via Microsoft·02:00 PM
Description
CVE Published
via MITRE·05:09 PM
Data Sourced
via MITRE·05:09 PM
DescriptionSeverity
Data Sourced
via NVD·06:18 PM
DescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

1

What is the severity of CVE-2026-55145?

CVE-2026-55145 has a severity rating of 7.1, which is classified as high.

2

What is CVE-2026-55145?

CVE-2026-55145 is an Outlook Copilot Tampering Vulnerability that allows an authorized attacker to perform command injection.

3

What impact does CVE-2026-55145 have on users?

The vulnerability can lead to unauthorized tampering over a network impacting command execution permissions.

4

How do I fix CVE-2026-55145?

To mitigate CVE-2026-55145, users should apply the latest security updates provided by Microsoft.

5

Which software is affected by CVE-2026-55145?

CVE-2026-55145 affects Microsoft Copilot and Microsoft Outlook Copilot.

Contact

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