CVE-2026-21259
EUVD-2026-735510.02.2026, 18:16
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to elevate privileges locally.Enginsight
Affected Products (NVD)
| Vendor | Product | Version |
|---|---|---|
| microsoft | 365_apps | - |
| microsoft | 365_apps | - |
| microsoft | office_online_server | 𝑥 < 16.0.10417.20097 |
𝑥
= Vulnerable software versions
Common Weakness Enumeration
- CWE-122 - Heap-based Buffer OverflowA heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
- CWE-787 - Out-of-bounds WriteThe software writes data past the end, or before the beginning, of the intended buffer.