Authenticated data exposure and tampering via command injection
Published Jul 14, 2026 · Updated Jul 14, 2026
Command injection in Outlook Copilot allows remote authenticated users to read sensitive data and alter data through network-delivered input. Microsoft has not disclosed the command-processing locus or how Outlook Copilot fails to neutralize special elements in attacker-controlled input. Exploitation requires authenticated access and user interaction, and the disclosed consequence is data exposure and modification without service interruption.
Summary
What happened
Command injection in Outlook Copilot allows remote authenticated users to read sensitive data and alter data through network-delivered input. Microsoft has not disclosed the command-processing locus or how Outlook Copilot fails to neutralize special elements in attacker-controlled input. Exploitation requires authenticated access and user interaction, and the disclosed consequence is data exposure and modification without service interruption.
The record
- CVE
- CVE-2026-55145
- Published
- Jul 14, 2026
- Updated
- Jul 14, 2026
- Vendor
- Microsoft
- Product
- Microsoft Copilot
- Classifications
- CWE-77
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 14, 2026CVE publishedPublication date reported by the CVE source.
- Jul 14, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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