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 under CWE-77 (Command Injection). It enables unauthorized attackers to disclose information over a network. The vulnerability is rated medium severity with 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). Microsoft manages remediation for this cloud-hosted service and has released an official fix as documented in their security update guide.
Potential Impact
An unauthorized attacker can exploit this command injection vulnerability to disclose sensitive information over a network. There is no indication of integrity or availability impact. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability in Microsoft 365 Copilot. As this is a cloud service, Microsoft manages the remediation server-side. Users and administrators should ensure their Microsoft 365 Copilot service is updated according to Microsoft's guidance available at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42824.
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
Affected software
Microsoft
Microsoft 365 Copilot
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). It enables unauthorized attackers to disclose information over a network. The vulnerability is rated medium severity with 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). Microsoft manages remediation for this cloud-hosted service and has released an official fix as documented in their security update guide.
Potential Impact
An unauthorized attacker can exploit this command injection vulnerability to disclose sensitive information over a network. There is no indication of integrity or availability impact. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability in Microsoft 365 Copilot. As this is a cloud service, Microsoft manages the remediation server-side. Users and administrators should ensure their Microsoft 365 Copilot service is updated according to Microsoft's guidance available at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42824.
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: 08/14/2026, 13:18:29 UTC
Last updated: 09/14/2026, 22:01:34 UTC
Views: 115
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