CVE-2021-1730 Microsoft Exchange Server Spoofing Vulnerability
A spoofing vulnerability in Microsoft Exchange Server allows attackers to impersonate users, requiring a patch to prevent identity deception.
- 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-2021-1730?
CVE-2021-1730 is a medium-severity vulnerability in Microsoft Exchange Server, published on 25 Feb 2021. 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
<p>A spoofing vulnerability exists in Microsoft Exchange Server which could result in an attack that would allow a malicious actor to impersonate the user.</p> <p>This update addresses this vulnerability.</p> <p>To prevent these types of attacks, Microsoft recommends customers to download inline images from different DNSdomains than the rest of OWA. Please see further instructions in the FAQ to put in place this mitigations.</p>
Which versions are affected by CVE-2021-1730?
It affects 1 product.
Products include Microsoft Exchange Server.
How do I fix CVE-2021-1730?
No fix has been published for CVE-2021-1730 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-1730 being exploited?
There is no known exploitation of CVE-2021-1730 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-mp5r-32pv-q987.