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9.9
CVE-2026-85885: Microsoft 365 Copilot can let attackers gain higher access
CVE-2026-85885 · published 11 days ago
Summary
A flaw in Microsoft 365 Copilot lets someone with valid access run special commands that increase their permissions across the network. This could allow the attacker to view or change data they normally couldn’t. Apply Microsoft’s latest updates and follow their guidance to protect your environment.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| microsoft | microsoft 365 copilot | - |
| microsoft | 365_copilot |
All versions
cpe:2.3:a:microsoft:365_copilot:-:*:*:*:*:*:*:* |
Original advisory text
Microsoft 365 Copilot Elevation of Privilege Vulnerability
Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an authorized attacker to elevate privileges over a network.
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85885 vendor-advisory patch
Severity
9.9
Critical
CVSS 3.1: 9.9 (NVD)
Exploitation
EPSS <1%
Type
CWE-77Command Injection
Timeline
Published17 Sep 2026
Updated27 Sep 2026
First seen17 Sep 2026
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