CVE-2026-42824: CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection') in Microsoft Microsoft 365 Copilot
Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to disclose information over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-42824) in Microsoft 365 Copilot involves improper neutralization of special elements in commands, classified as CWE-77 (command injection). It enables an unauthorized attacker to disclose sensitive information over a network without requiring privileges but does require user interaction. The vulnerability affects the cloud-hosted Microsoft 365 Copilot service. Microsoft has released an official fix and manages remediation server-side for this cloud service.
Potential Impact
An attacker can exploit this vulnerability to disclose sensitive information over the network. The vulnerability does not impact integrity or availability but has a high impact on confidentiality. Exploitation requires user interaction but no privileges. No known exploits are currently reported in the wild.
Mitigation Recommendations
Microsoft has provided an official fix for this vulnerability and manages remediation for the cloud-hosted Microsoft 365 Copilot service. Users and administrators should ensure their Microsoft 365 Copilot service is updated per Microsoft's guidance. No additional action is required beyond applying the official fix.
CVE-2026-42824: CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection') in Microsoft Microsoft 365 Copilot
Description
Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to disclose information over a network.
CVSS v3.1
Score 6.5medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-42824) in Microsoft 365 Copilot involves improper neutralization of special elements in commands, classified as CWE-77 (command injection). It enables an unauthorized attacker to disclose sensitive information over a network without requiring privileges but does require user interaction. The vulnerability affects the cloud-hosted Microsoft 365 Copilot service. Microsoft has released an official fix and manages remediation server-side for this cloud service.
Potential Impact
An attacker can exploit this vulnerability to disclose sensitive information over the network. The vulnerability does not impact integrity or availability but has a high impact on confidentiality. Exploitation requires user interaction but no privileges. No known exploits are currently reported in the wild.
Mitigation Recommendations
Microsoft has provided an official fix for this vulnerability and manages remediation for the cloud-hosted Microsoft 365 Copilot service. Users and administrators should ensure their Microsoft 365 Copilot service is updated per Microsoft's guidance. No additional action is required beyond applying the official fix.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-30T14:51:12.702Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Is Cloud Service
- true
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42824","vendor":"Microsoft"}]
Threat ID: 6a2200c5e29bf47b50d9ece1
Added to database: 06/04/2026, 22:48:37 UTC
Last enriched: 07/29/2026, 21:46:07 UTC
Last updated: 07/31/2026, 21:26:44 UTC
Views: 86
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