CVE-2026-26134
Microsoft Office Elevation of Privilege Vulnerability
Integer overflow or wraparound in Microsoft Office allows an authorized attacker to elevate privileges locally.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Microsoft Office Elevation of Privilege Vulnerability
Integer overflow or wraparound in Microsoft Office allows an authorized attacker to elevate privileges locally.
- Record
CVE-2026-26134- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Weakness
- CWE-190, CWE-416
- Updated
- 2026-11-02
EUVDEUVD-2026-10699
Integer overflow or wraparound in Microsoft Office allows an authorized attacker to elevate privileges locally.
- Record
EUVD-2026-10699- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-46v7-2rrf-mc24
Integer overflow or wraparound in Microsoft Office allows an authorized attacker to elevate...
Integer overflow or wraparound in Microsoft Office allows an authorized attacker to elevate privileges locally.
- Record
GHSA-46v7-2rrf-mc24- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-190
- Updated
- 2026-11-02
NVD
Integer overflow or wraparound in Microsoft Office allows an authorized attacker to elevate privileges locally.
- Record
CVE-2026-26134- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-190, CWE-416
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-26134 is a high vulnerability (CVSS 7.8) in Microsoft 365 Copilot, published March 10, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.38%, the 31st percentile. No source names a fixed version.