CVE-2026-85885 Microsoft 365 Copilot Elevation of Privilege Vulnerability
An authorized attacker can exploit command injection in Microsoft 365 Copilot to elevate privileges over the network.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-85885?
CVE-2026-85885 is a critical command injection vulnerability in Microsoft 365 Copilot, published on 17 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an authorized attacker to elevate privileges over a network.
Weakness: CWE-77
Which versions are affected by CVE-2026-85885?
It affects 1 product.
Products include Microsoft 365 Copilot.
How do I fix CVE-2026-85885?
No fix has been published for CVE-2026-85885 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-85885 being exploited?
There is no known exploitation of CVE-2026-85885 in the wild and no public exploit code.
Other vulnerabilities in Microsoft 365 Copilot
- CVE-2026-50517 Microsoft M365 Copilot Remote Code Execution Vulnerability
- CVE-2026-54130 M365 Copilot Information Disclosure Vulnerability
- CVE-2025-60724 GDI+ Remote Code Execution Vulnerability
- CVE-2025-53766 GDI+ Remote Code Execution Vulnerability
- CVE-2026-48561 Microsoft Edge Copilot Remote Code Execution Vulnerability
Sources
Also known as GHSA-jjmx-rwxc-vwh4.