Medium severity · published Feb 11, 2025
CVE-2025-21259
Microsoft Outlook Spoofing Vulnerability
5.3
CVSS
1.2%
EPSS
No
On KEV
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 67% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OU
Outlook · Microsoft
before 4.2501.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-21259
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-21259
Patch
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21259
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