CVE-2026-42824: CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection') in Microsoft Microsoft 365 Copilot
CVE-2026-42824 is a command injection vulnerability in Microsoft 365 Copilot caused by improper neutralization of special elements used in commands. This flaw allows an unauthorized attacker to disclose information over a network. The vulnerability has a CVSS score of 6. 5, indicating a medium severity level. Microsoft has issued an official fix for this cloud-hosted service, meaning remediation is managed by the vendor. There are no known exploits in the wild at this time.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-42824) in Microsoft 365 Copilot involves improper neutralization of special elements in commands, classified under CWE-77 (Command Injection). An attacker can leverage this weakness to disclose sensitive information over a network without requiring privileges, though user interaction is needed. The vulnerability has a CVSS 3.1 base score of 6.5 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N), reflecting network attack vector, low complexity, no privileges required, but user interaction needed, and high confidentiality impact. Microsoft has released an official fix and manages remediation for this cloud service.
Potential Impact
An attacker can exploit this vulnerability to disclose sensitive information over the network. The confidentiality impact is high, but integrity and availability are not affected. No known exploits are currently reported in the wild.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability in Microsoft 365 Copilot. As this is a cloud-hosted service, Microsoft manages the remediation on their side. Users and administrators should ensure their Microsoft 365 Copilot service is updated according to the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42824 to protect against this issue.
CVE-2026-42824: CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection') in Microsoft Microsoft 365 Copilot
Description
CVE-2026-42824 is a command injection vulnerability in Microsoft 365 Copilot caused by improper neutralization of special elements used in commands. This flaw allows an unauthorized attacker to disclose information over a network. The vulnerability has a CVSS score of 6. 5, indicating a medium severity level. Microsoft has issued an official fix for this cloud-hosted service, meaning remediation is managed by the vendor. There are no known exploits in the wild at this time.
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 under CWE-77 (Command Injection). An attacker can leverage this weakness to disclose sensitive information over a network without requiring privileges, though user interaction is needed. The vulnerability has a CVSS 3.1 base score of 6.5 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N), reflecting network attack vector, low complexity, no privileges required, but user interaction needed, and high confidentiality impact. Microsoft has released an official fix and manages remediation for this cloud service.
Potential Impact
An attacker can exploit this vulnerability to disclose sensitive information over the network. The confidentiality impact is high, but integrity and availability are not affected. No known exploits are currently reported in the wild.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability in Microsoft 365 Copilot. As this is a cloud-hosted service, Microsoft manages the remediation on their side. Users and administrators should ensure their Microsoft 365 Copilot service is updated according to the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42824 to protect against this issue.
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: 6/4/2026, 10:48:37 PM
Last enriched: 6/4/2026, 11:04:18 PM
Last updated: 6/5/2026, 5:01:04 AM
Views: 6
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