Buffer overflow in Microsoft 365 Apps For Enterprise
CVE-2026-70096
Heap-based buffer overflow in Windows Rich Text Edit Control allows an unauthorized attacker to execute code over a network.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Microsoft 365 Apps For Enterprise
- Microsoft Office 365 For Mac
- Microsoft Office Ltsc 2021
- Microsoft Office Ltsc 2024
- Microsoft Office Ltsc For Mac 2021
- Microsoft Office Ltsc For Mac 2024
- Microsoft Windows 10 Version 1607
- Microsoft Windows 10 Version 1809
- Microsoft Windows 10 Version 21h2
- Microsoft Windows 10 Version 22h2
Weakness classification (CWE)
References
- Windows Rich Text Edit Control Remote Code Execution Vulnerability (vendor-advisory, patch)
Frequently asked questions
- What is CVE-2026-70096?
- CVE-2026-70096 is a critical-severity vulnerability in Microsoft 365 Apps For Enterprise, classified under Heap-based Buffer Overflow. CVSS score: 9.8/10. Published 2026-10-13.
- How severe is CVE-2026-70096?
- Critical severity. CVSS v3 base score is 9.8 out of 10.