Vulnerability · Published Sep 8, 2026 · Assigned by microsoft
CVE-2026-68880Windows Win32k Elevation of Privilege Vulnerability
High 8.0
In plain English
A high-severity heap buffer overflow in Microsoft Office 365 for Mac 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 56% of all known vulnerabilities).
Severity (CVSS 3.1)8.0High
Exploit odds (30 days)0.8%top 44.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Heap-based buffer overflow in Windows Win32K allows an authorized attacker to elevate privileges over a network.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft Office 365 for Mac | 1.0.0 – before 16.112.26090911 |
| Microsoft | Microsoft Office for Android | 16.0.1 – before 16.0.20430.20000 |
| Microsoft | Microsoft Office LTSC for Mac 2021 | 16.0.1 – before 16.112.26090911 |
| Microsoft | Microsoft Office LTSC for Mac 2024 | 16.0.0 – before 16.112.26090911 |
Weakness: CWE-122, CWE-197 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
References
- Windows Win32k Elevation of Privilege Vulnerability vendor-advisory, patch