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Security researchers at Jamf discovered the XCSSET malware exploiting the vulnerability, patched in Big Sur 11.4, to take photos of people’s computer screens without their knowing.
Apple has patched a critical bug in macOS that could be exploited to take screenshots of someone’s computer and capture images of their activity within applications or on video conferences without that person knowing.
Apple addressed the vulnerability—discovered by researchers at enterprise cybersecurity firm Jamf— in the latest version of macOS, Big Sur 11.4, released on Monday, the company told Forbes, according to a published report.
Researchers said they discovered that the XCSSET spyware was using the vulnerability, tracked as CVE-2021-30713, “specifically for the purpose of taking screenshots of the user’s desktop without requiring additional permissions,” according to a post on the Jamf blog.