CVE-2025-21259
Microsoft Outlook Spoofing Vulnerability
5.3 Medium
Microsoft Outlook Spoofing Vulnerability
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
- None
- Integrity
- Low
- Availability
- None
Exploit likelihood
1.15%Up 1.1 points since Feb 12, 2025
What each source reports
CVE List Score used
Microsoft Outlook Spoofing Vulnerability
Microsoft Outlook Spoofing Vulnerability
- Record
CVE-2025-21259- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C - Weakness
- CWE-451
- Updated
- 2026-11-02
EUVDEUVD-2025-2325
Microsoft Outlook Spoofing Vulnerability
- Record
EUVD-2025-2325- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-47m6-2q4v-m2vx
Microsoft Outlook Spoofing Vulnerability
Microsoft Outlook Spoofing Vulnerability
- Record
GHSA-47m6-2q4v-m2vx- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-451
- Updated
- 2026-11-02
NVD
Microsoft Outlook Spoofing Vulnerability
- Record
CVE-2025-21259- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-451
- 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-2025-21259 is a medium vulnerability (CVSS 5.3) in Microsoft Outlook, published February 11, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.15%, the 67th percentile. No source names a fixed version.