Microsoft Outlook Spoofing Vulnerability

CVE-2026-124194 is a spoofing vulnerability in Microsoft Office Outlook (rated Moderate, CVSS 6.5). Microsoft reports that it is being exploited.

Exploited1 version

Facts

Microsoft id
CVE-2026-124194
Status
Exploited
Products
Microsoft Office Outlook
Severity
Moderate
Impact
Spoofing
CVSS
6.5
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:H/RL:O/RC:C
Exploited
Yes
Publicly disclosed
No
Exploitability
Exploitation Detected
Customer action required
Yes
Release
2026-Nov
Assigned by
Microsoft
Weakness
CWE-356: Product UI does not Warn User of Unsafe Actions
MSRC revision
1.0
Status pages
Outlook status
First captured by us
Microsoft last modified
Source
Security updates · open the original at Microsoft

Microsoft's revision notes

  1. Revision 1.0, 2026-11-10: Information published.

Microsoft says

Product ui does not warn user of unsafe actions in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network.

Security updates,

Read Microsoft's full post

What Microsoft changed

One version so far. If Microsoft edits it, each change shows here with what was removed and added.

  1. First version we captured ·

    As first seen: Exploited
    Status
    Exploited

    Seen by us · Microsoft's timestamp · Microsoft's page

Mentioning the same Microsoft ids

Other changes for Outlook

Last updated