Microsoft Security Update Guide · Office / Microsoft 365 Apps
Microsoft Office Word Security Feature Bypass Vulnerability
Published
What does this mean?
- Security Feature Bypass. An attacker can get around a security feature.
- It can be exploited with access to the device itself, without an account and if a user takes part, for example by opening a link or file.
- CVSS 7.8 out of 10: high. Microsoft rates it Important.
- No attacks reported; Microsoft expects exploitation to be less likely.
- What should you do? Install the security update for the version you run (or a later cumulative update):
- Microsoft Office LTSC for Mac 2024: KBRelease Notes
- Microsoft Office 365 for Mac: KBRelease Notes
- Microsoft Office LTSC for Mac 2021: KBRelease Notes
- Microsoft Office LTSC 2024 for 32-bit editions: KBRelease Notes
16.0.17932.21056 - Microsoft 365 Apps for Enterprise for 32-bit Systems: KBRelease Notes
https://aka.ms/OfficeSecurityReleases - Microsoft Office LTSC 2024 for 64-bit editions: KBRelease Notes
16.0.17932.21056
Reliance on untrusted inputs in a security decision in Microsoft Office Word allows an unauthorized attacker to bypass a security feature locally.
How do I check if I am affected?
Update the app
- Update the app through the App Store, Google Play or the app's own automatic updates.
- If you manage devices with Intune, check in the Intune admin center which devices still run an older version.
Key facts
Released
13 okt 2026
Impact
Security Feature Bypass
Max severity
Important
Weakness
CVSS 3.1
7.8 / 6.8 (base / temporal)
Vector string
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:CPublicly disclosed
No
Exploited
No
Exploitability assessment
Exploitation Less Likely
Customer action required
Yes
Links
CVSS metrics
| Base score metrics | |
|---|---|
| Attack Vector | Local |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | Required |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity | High |
| Availability | High |
| Temporal score metrics | |
| Exploit Code Maturity | Unproven |
| Remediation Level | Official Fix |
| Report Confidence | Confirmed |
Affected products and updates
| Product | Update | Build |
|---|---|---|
| Microsoft Office LTSC for Mac 2024 | KBRelease Notes | — |
| Microsoft Office 365 for Mac | KBRelease Notes | — |
| Microsoft Office LTSC for Mac 2021 | KBRelease Notes | — |
| Microsoft Office LTSC 2024 for 32-bit editions | KBRelease Notes | 16.0.17932.21056 |
| Microsoft 365 Apps for Enterprise for 32-bit Systems | KBRelease Notes | https://aka.ms/OfficeSecurityReleases |
| Microsoft Office LTSC 2024 for 64-bit editions | KBRelease Notes | 16.0.17932.21056 |
| Microsoft 365 Apps for Enterprise for 64-bit Systems | KBRelease Notes | https://aka.ms/OfficeSecurityReleases |
FAQ
- Is the Preview Pane an attack vector for this vulnerability?
- Yes, the Preview Pane is an attack vector.
- Are the updates for the Microsoft Office LTSC for Mac currently available?
- The security update for Microsoft Office LTSC for Mac 2021 and 2024 are not immediately available. The updates will be released as soon as possible, and when they are available, customers will be notified via a revision to this CVE information.
- What kind of security feature could be bypassed by successfully exploiting this vulnerability?
- An attacker who successfully exploited this vulnerability could bypass Office macro policies used to block untrusted or malicious files.
Revisions
| Version | Date | Note |
|---|---|---|
| 1 | 13 okt 2026 | Information published. |
This is in the weekly digest for week 42: everything that changed in Microsoft 365 this week. →
View at Microsoft → ← All security advisories
Source: Microsoft Security Update Guide. 365Fanatic is not affiliated with Microsoft.
