Vulnerability · Published Sep 8, 2026 · Assigned by microsoft
CVE-2026-80080Microsoft Office Word Remote Code Execution Vulnerability
High 8.8
In plain English
A high-severity double free 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 0.8% (higher than 57% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.8%top 42.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Double free in Microsoft Office Word 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 16.0.20326.20138 |
| Microsoft | Microsoft Office 2019 | 19.0.0 – before 16.0.10417.20207 |
| Microsoft | Microsoft Office 365 for Mac | 1.0.0 – before 16.113.26091433 |
| Microsoft | Microsoft Office LTSC 2021 | 16.0.1 – before 16.0.14334.20906 |
| Microsoft | Microsoft Office LTSC 2024 | 16.0.0 – before 16.0.17932.20976 |
| Microsoft | Microsoft Office LTSC for Mac 2021 | 16.0.1 – before 16.113.26091433 |
| Microsoft | Microsoft Office LTSC for Mac 2024 | 16.0.0 – before 16.113.26091433 |
| Microsoft | Microsoft Word 2016 | 16.0.1 – before 16.0.5569.1000 |
Weakness: CWE-415 · 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 Office Word Remote Code Execution Vulnerability vendor-advisory, patch