CVE-2021-31207 Microsoft Exchange Server Security Feature Bypass
Attackers can bypass security features in Microsoft Exchange Server, potentially facilitating further exploitation or unauthorized access.
- Exploited in the wild
- Since 3 Nov 2021
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-31207?
CVE-2021-31207 is a medium-severity vulnerability in Microsoft Exchange Server, published on 11 May 2021. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Microsoft Exchange Server Security Feature Bypass Vulnerability
Weakness: CWE-434
Which versions are affected by CVE-2021-31207?
It affects 1 product.
Products include Microsoft Exchange Server.
How do I fix CVE-2021-31207?
No fix has been published for CVE-2021-31207 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 17 Nov 2021.
Is CVE-2021-31207 being exploited?
Yes. Attackers have exploited CVE-2021-31207 in the wild since at least 3 Nov 2021, including in ransomware campaigns.
Public exploit code: 1 Metasploit module.
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-jcxv-6f65-7hrx.