CVE-2018-8582 Code injection in Microsoft Office

High 8.8 Published Updated

Attackers can execute arbitrary code by tricking users into opening specially modified rule export files in Microsoft Outlook.

Exploited in the wild
Not known
Login needed
Not needed
Attackable
Over the internet
Victim action needed
A user has to click or open something
Fix
None listed

What is CVE-2018-8582?

CVE-2018-8582 is a high-severity code injection vulnerability in Microsoft Office 365 Proplus, published on 14 Nov 2018. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

A remote code execution vulnerability exists in the way that Microsoft Outlook parses specially modified rule export files, aka "Microsoft Outlook Remote Code Execution Vulnerability." This affects Office 365 ProPlus, Microsoft Office, Microsoft Outlook. This CVE ID is unique from CVE-2018-8522, CVE-2018-8524, CVE-2018-8576.

Which versions are affected by CVE-2018-8582?

It affects 4 products.

Products include Microsoft Office 365 Proplus, Microsoft Outlook, Microsoft Outlook Rt, Microsoft Windows Server 2019.

How do I fix CVE-2018-8582?

No fix has been published for CVE-2018-8582 yet. Limit exposure of the affected software until one is available.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2018-8582 being exploited?

There is no known exploitation of CVE-2018-8582 in the wild and no public exploit code.

All Microsoft Office 365 Proplus vulnerabilities

Sources

Also known as GHSA-3p5h-mwh8-3wx4.

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