An unpatched and previously unknown security vulnerability has been discovered in the Zoom Client for Windows, affecting computers running Windows 7 and older OS versions.
The vulnerability enables a remote attacker to execute arbitrary code on a victim’s machine where Zoom Client for Windows – any supported version – is installed. The flaw could be exploited by tricking a user into performing a typical action, such as opening a document file. Users will not see a security warning over the course of the attack.
Zoom has confirmed the flaw and is working on a patch, Forbes reports. The videoconferencing company was informed by security firm 0patch, which learned of the bug from a researcher who requested anonymity. 0patch analysis confirmed it’s only exploitable on Windows 7 and older systems. It may be exploitable on Windows Server 2008 R2 and earlier, though the systems weren’t tested.
It’s important to note Windows 7 users are vulnerable to this kind of attack even if their systems are fully updated with extended security updates, 0patch points out. Zoom clients on Windows 8 and 10 are not affected. 0patch has released a micropatch to protect users of its 0patch agent as Zoom works on its own fix.
Microsoft terminated support for Windows 7 and Windows Server 2008 earlier this year, meaning technical assistance and software updates via Windows Update are longer available.
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