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CVE-2026-48561 is a critical remote code execution vulnerability in Microsoft Copilot caused by improper neutralization of special elements used in a command, classified as CWE-77. The flaw allows attacker-controlled input or crafted prompts to be processed without sufficient neutralization, enabling command injection and subsequent code execution. Microsoft assessed the issue as remotely exploitable over the network with no privileges required, but with user interaction required. Reported attack scenarios indicate that a malicious website can cause Microsoft Edge for Android to automatically send crafted prompts to Copilot when a user visits the site, and the affected component may process those requests without adequate confirmation or origin checks. Microsoft also indicated that successful exploitation can involve a scope change across a security boundary, including a scenario in which code execution is achieved from a low-privilege Hyper-V guest context on the Hyper-V host execution environment.
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No public exploit code observed for this vulnerability.
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A critical remote code execution vulnerability in Microsoft Copilot.
A critical remote code execution vulnerability in Microsoft Copilot that can be triggered over the network via a malicious website causing Edge for Android to send crafted prompts to Copilot.
A critical remote code execution vulnerability in Microsoft Copilot that can be triggered over the network via a malicious website causing Microsoft Edge for Android to send crafted prompts to Copilot.
A remote code execution vulnerability in Copilot caused by improper neutralization of input, allowing unauthorized code execution from low-privileged Hyper-V guest access.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.