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

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Microsoft
  • Copilot

No data.

No data.

No data.

References
Link Providers
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55145 cve-icon
History

Tue, 14 Jul 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 14 Jul 2026 17:45:00 +0000

Type Values Removed Values Added
Description Improper neutralization of special elements used in a command ('command injection') in Outlook Copilot allows an authorized attacker to perform tampering over a network.
Title Outlook Copilot Tampering Vulnerability
First Time appeared Microsoft
Microsoft copilot
Weaknesses CWE-77
CPEs cpe:2.3:a:microsoft:copilot:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft copilot
References
Metrics cvssV3_1

{'score': 6.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N/E:P/RL:O/RC:C'}
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-07-14T19:41:19.127Z

Reserved: 2026-06-16T15:03:49.682Z

Link: CVE-2026-55145

cve-icon Vulnrichment

Updated: 2026-07-14T18:49:52.628Z

cve-icon NVD

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cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.