Vulnerability · Published Oct 13, 2026 · Assigned by microsoft
CVE-2026-105718Microsoft Excel Remote Code Execution Vulnerability
High 8.8
In plain English
A high-severity out-of-bounds read in Microsoft 365 Apps for Enterprise from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 62% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)1.0%top 38.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise | 16.0.1 – before https://aka.ms/OfficeSecurityReleases |
| Microsoft | Microsoft Office 365 for Mac | 1.0.0 – before 16.114.26101123 |
| Microsoft | Microsoft Office LTSC 2021 | 16.0.1 – before 16.0.14334.20974 |
| Microsoft | Microsoft Office LTSC 2024 | 16.0.0 – before 16.0.17932.21056 |
| Microsoft | Microsoft Office LTSC for Mac 2021 | 16.0.1 – before 16.114.26101123 |
| Microsoft | Microsoft Office LTSC for Mac 2024 | 16.0.0 – before 16.114.26101123 |
| Microsoft | Office Online Server | 16.0.0.0 – before 16.0.10417.20228 |
Weakness: CWE-125, CWE-20 · 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
References
- Microsoft Excel Remote Code Execution Vulnerability vendor-advisory, patch