CVE-2021-31198 Microsoft Exchange Server Remote Code Execution Vulnerability
Attackers can execute arbitrary code on Microsoft Exchange Server, requiring immediate patching by system administrators.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-31198?
CVE-2021-31198 is a high-severity code injection vulnerability in Microsoft Exchange Server, published on 11 May 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Microsoft Exchange Server Remote Code Execution Vulnerability
Which versions are affected by CVE-2021-31198?
It affects 1 product.
Products include Microsoft Exchange Server.
How do I fix CVE-2021-31198?
No fix has been published for CVE-2021-31198 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-2021-31198 being exploited?
There is no known exploitation of CVE-2021-31198 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Exchange Server
- CVE-2024-21410 Microsoft Exchange Server Privilege Escalation
- CVE-2021-34473 Microsoft Exchange Server Remote Code Execution
- CVE-2021-26855 Microsoft Exchange Server Remote Code Execution
- CVE-2021-34523 Microsoft Exchange Server Privilege Escalation
- CVE-2023-21529 Microsoft Exchange Server Deserialization of Untrusted Data
Sources
Also known as GHSA-q258-48f4-r94w.