CVE-2025-59248 Microsoft Exchange Server Spoofing Vulnerability
An unauthorized attacker can perform spoofing attacks against Microsoft Exchange Server due to improper input validation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-59248?
CVE-2025-59248 is a high-severity vulnerability in Microsoft Exchange Server, published on 14 Oct 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Improper input validation in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.
Weakness: CWE-20
Which versions are affected by CVE-2025-59248?
It affects 2 products.
Products include Microsoft Exchange Server, Microsoft Exchange Server Subscription Edition.
How do I fix CVE-2025-59248?
No fix has been published for CVE-2025-59248 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-59248 being exploited?
There is no known exploitation of CVE-2025-59248 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-4fp2-p8gm-qx95.