CVE-2026-118301
Microsoft Office Excel Remote Code Execution Vulnerability
Use of uninitialized resource in Microsoft Office Excel 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 Excel Remote Code Execution Vulnerability
Use of uninitialized resource in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
- Record
CVE-2026-118301- 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-908
- Updated
- 2026-11-10
EUVDEUVD-2026-122568
Use of uninitialized resource in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
- Record
EUVD-2026-122568- 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-6p6x-63gp-j6gc
Use of uninitialized resource in Microsoft Office Excel allows an unauthorized attacker to...
Use of uninitialized resource in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
- Record
GHSA-6p6x-63gp-j6gc- 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-908
- Updated
- 2026-11-10
NVD
Use of uninitialized resource in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
- Record
CVE-2026-118301- 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-908
- Updated
- 2026-11-10
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| published | EUVD | |
| published | EUVD, NVD | |
| aliases, references | GitHub Advisories | |
| cwes, references, severity, title | CVE List | |
| first indexed | EUVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-118301 is a high vulnerability (CVSS 7.5) in Microsoft 365 Apps For Enterprise, published November 10, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.70%, the 53rd percentile. No source names a fixed version.