What is CVE-2025-21259?

CVE-2025-21259 is a medium-severity vulnerability in Microsoft Outlook For Android, classified under User Interface (UI) Misrepresentation of Critical Information. CVSS score: 5.3/10. Published 2025-02-11.

How severe is CVE-2025-21259?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Microsoft Outlook For Android

CVE-2025-21259

Microsoft Outlook Spoofing Vulnerability

EPSS: 0.006 (70.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: 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.

Affected products

Microsoft Outlook For Android — versions 1.0

Weakness classification (CWE)

CWE-451 — User Interface (UI) Misrepresentation of Critical Information

References

Microsoft Outlook Spoofing Vulnerability (vendor-advisory, patch)

Frequently asked questions

What is CVE-2025-21259?: CVE-2025-21259 is a medium-severity vulnerability in Microsoft Outlook For Android, classified under User Interface (UI) Misrepresentation of Critical Information. CVSS score: 5.3/10. Published 2025-02-11.
How severe is CVE-2025-21259?: Medium severity. CVSS v3 base score is 5.3 out of 10.