CVE-2026-55145

Outlook Copilot Tampering Vulnerability

Published Jul 14, 2026 CVSS 3.1 · 6.3 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

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

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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
microsoft
Published
Updated
Nov 10, 2026, 10:39 PM
Reserved
Jun 16, 2026, 3:03 PM
Status
Analyzed
Published
Jul 14, 2026, 6:18 PM
Modified
Oct 24, 2026, 9:10 PM