Attacker Value
High
(1 user assessed)
Exploitability
Moderate
(1 user assessed)
User Interaction
Unknown
Privileges Required
Unknown
Attack Vector
Unknown
1

CVE-2022-21840

Last updated January 10, 2022
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Description

** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided.

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Technical Analysis

Looks like this is your fairly typical maliciously crafted document exploit for Microsoft Office. These bugs are used all the time by APTs and other groups simply cause its relatively easy to convince people to open documents given the right context, and even though some people will be fairly vigilant, all it takes is compromising one user to get an initial foothold into a target network.

This bug appears to affect all Microsoft Office versions since 2013 up to and including the latest Microsoft Office online solutions and also including Microsoft Sharepoint Servers from 2013 onwards, meaning that it has quite a wide range of potential targets. User interaction is required though in the form of opening a malicious document,

Given the supposedly low complexity of exploiting this vulnerability combined with the wide range of target that it can exploit, I’d expect to see exploits for this vulnerability in the wild over the coming few months.

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Technical Analysis