Vulnerability · Published Sep 8, 2026 · Assigned by microsoft
CVE-2026-69477Microsoft Office Access Remote Code Execution Vulnerability
High 7.3
In plain English
A high-severity heap buffer overflow 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 0.4% (higher than 37% of all known vulnerabilities).
Severity (CVSS 3.1)7.3High
Exploit odds (30 days)0.4%top 62.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Heap-based buffer overflow in Microsoft Office Access allows an authorized attacker to execute code locally.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise | 16.0.1 – before 16.0.20326.20138 |
| Microsoft | Microsoft Access 2016 | 16.0.0 – before 16.0.5569.1000 |
| Microsoft | Microsoft Access 2016 (32-bit edition) | 16.0.0 – before 16.0.5569.1000 |
| Microsoft | Microsoft Office 2019 | 19.0.0 – before 16.0.10417.20207 |
| 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 |
Weakness: CWE-122 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
References
- Microsoft Office Access Remote Code Execution Vulnerability vendor-advisory, patch