CVE-2026-100208
Microsoft Office Outlook Remote Code Execution Vulnerability
Integer overflow or wraparound in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Microsoft Office Outlook Remote Code Execution Vulnerability
Integer overflow or wraparound in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
- Record
CVE-2026-100208- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Weakness
- CWE-190, CWE-122
- Updated
- 2026-11-10
EUVDEUVD-2026-87317
Integer overflow or wraparound in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
- Record
EUVD-2026-87317- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-10
GitHub AdvisoriesGHSA-757q-589w-v977
Integer overflow or wraparound in Microsoft Office Outlook allows an unauthorized attacker to...
Integer overflow or wraparound in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
- Record
GHSA-757q-589w-v977- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-122, CWE-190
- Updated
- 2026-11-02
NVD
Integer overflow or wraparound in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
- Record
CVE-2026-100208- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H - CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-122, CWE-190
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | CVE List | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-100208 is a high vulnerability (CVSS 7.5) in Microsoft 365 Apps, published September 25, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.45%, the 39th percentile. No source names a fixed version.