Microsoft Office Word Remote Code Execution Vulnerability
CVE-2026-109503 is a remote code execution vulnerability in Microsoft Office Word (rated Important, CVSS 8.8).
1 version
Facts
- Microsoft id
CVE-2026-109503- Products
- Microsoft Office Word
- Severity
- Important
- Impact
- Remote Code Execution
- CVSS
- 8.8
- CVSS vector
- CVSS:3.1/AV:N/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-Nov
- Assigned by
- Microsoft
- Weakness
- CWE-415: Double Free
- MSRC revision
- 1.0
- Status pages
- Microsoft 365 apps status
- First captured by us
- Microsoft last modified
- Source
- Security updates · open the original at Microsoft
Microsoft's revision notes
- Revision 1.0, 2026-11-10:
Information published.
Microsoft says
Double free in Microsoft Office Word allows an unauthorized attacker to execute code over a network. How could an attacker exploit this vulnerability?
What Microsoft changed
One version so far. If Microsoft edits it, each change shows here with what was removed and added.
First version we captured ·
The text as we first saw it
Seen by us · Microsoft's timestamp · Microsoft's page
Related changes
Mentioning the same Microsoft ids
Other changes for Microsoft 365 apps
- Microsoft Office Excel Remote Code Execution Vulnerability
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- Microsoft Office Excel Information Disclosure Vulnerability
- Microsoft Office Excel Remote Code Execution Vulnerability
- Microsoft Office Excel Remote Code Execution Vulnerability
- Microsoft Office Excel Remote Code Execution Vulnerability
Last updated