CVE-2025-59248
Microsoft Exchange Server Spoofing Vulnerability
Improper input validation in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Microsoft Exchange Server Spoofing Vulnerability
Improper input validation in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.
- Record
CVE-2025-59248- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C - Weakness
- CWE-20
- Updated
- 2026-11-02
EUVDEUVD-2025-34275
Improper input validation in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.
- Record
EUVD-2025-34275- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-4fp2-p8gm-qx95
Improper input validation in Microsoft Exchange Server allows an unauthorized attacker to perform...
Improper input validation in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.
- Record
GHSA-4fp2-p8gm-qx95- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-20
- Updated
- 2026-11-02
NVD
Improper input validation in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.
- Record
CVE-2025-59248- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-20
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-59248 is a high vulnerability (CVSS 7.5) in Microsoft Exchange Server, published October 14, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.02%, the 63rd percentile. No source names a fixed version.