Security researchers with Google’s Project Zero team have disclosed an Android vulnerability that appears to have been exploited in the real world, ZDNet reports.

The issue affects phones manufactured by Samsung, including the Galaxy S7, S8, and S9, as well as the Huawei P20, Pixel 1, and Pixel 2.

An Android spokesperson said that an attacker would either need to get their target to install a malicious application or pair the attack with a second exploit via a program like a web browser.

At that point, the exploit achieves “full compromise” of a device.

Instances of the exploit being used in the real world were discovered by Google’s Threat Analysis Group, which suggests that the exploit may have been used or sold by the NSO Group, an Israeli-based spyware vendor which was most recently behind a piece of spyware that can be injected into a phone via a WhatsApp call.

When contacted for comment by The Verge, the NSO Group denied that it had any involvement with the exploit.

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