CVE-2025-62459
Microsoft Defender Portal Spoofing Vulnerability
8.3 High
Microsoft Defender Portal Spoofing Vulnerability
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- Low
Exploit likelihood
0.33%Up 0.2 points since Nov 21, 2025
What each source reports
CVE List Score used
Microsoft Defender Portal Spoofing Vulnerability
Microsoft Defender Portal Spoofing Vulnerability
- Record
CVE-2025-62459- CVSS 3.1
- 8.3 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L/E:U/RL:O/RC:C - Weakness
- CWE-79
- Updated
- 2026-11-02
EUVDEUVD-2025-198367
Microsoft Defender Portal Spoofing Vulnerability
- Record
EUVD-2025-198367- CVSS 3.1
- 8.3 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-6fq4-36mv-2v76
Microsoft Defender Portal Spoofing Vulnerability
Microsoft Defender Portal Spoofing Vulnerability
- Record
GHSA-6fq4-36mv-2v76- CVSS 3.1
- 8.3 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L - Weakness
- CWE-79
- Updated
- 2026-11-02
NVD
Microsoft Defender Portal Spoofing Vulnerability
- Record
CVE-2025-62459- CVSS 3.1
- 8.3 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L - CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- 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-2025-62459 is a high vulnerability (CVSS 8.3) in Microsoft 365 Defender Portal, published November 20, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.33%, the 26th percentile. No source names a fixed version.