Critical severity · published Jul 14, 2026
CVE-2026-48561
Microsoft Edge Copilot Remote Code Execution Vulnerability
9.6
CVSS
0.9%
EPSS
No
On KEV
Description
Improper neutralization of special elements used in a command ('command injection') in Copilot Chat (Microsoft Edge) allows an unauthorized attacker to execute code over a network.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 58% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ME
Microsoft Edge Copilot for Android · Microsoft
1.0.0 before publication · source: vendor
ME
Microsoft Edge Copilot for IOS · Microsoft
1.0.0 before publication · source: vendor
3C
365 Copilot · Microsoft
All versions, or not specified · source: NVD
Affected product
ME
Microsoft Edge Copilot for Android
Microsoft