MicrosoftRadarIndependent status for Microsoft services

Microsoft Office Outlook Remote Code Execution Vulnerability

CVE-2026-70125 is a remote code execution vulnerability in Microsoft Office Outlook (rated Important, CVSS 7.8).

1 version

Facts

Microsoft id
CVE-2026-70125
Products
Microsoft Office Outlook
Severity
Important
Impact
Remote Code Execution
CVSS
7.8
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Less Likely
Customer action required
Yes
Release
2026-Sep
Assigned by
Microsoft
Weakness
CWE-122: Heap-based Buffer Overflow
MSRC revision
1.3
Status pages
Outlook status
First captured by us
(from our first import of this list)
Microsoft last modified
Source
Security updates · open the original at Microsoft

Microsoft's revision notes

  1. Revision 1.0, 2026-09-23: Information published.
  2. Revision 1.1, 2026-09-23: Information published.
  3. Revision 1.2, 2026-09-30: CWE added. Informational change only.
  4. Revision 1.3, 2026-10-30: Updated one or more CVSS scores for the affected products. This is an informational change only.

Microsoft says

Heap-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code locally. According to the CVSS metric, user interaction is required (UI:R).

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 ·

    The text as we first saw it

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

Other changes for Outlook