CVE-2026-64909
7.8
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Exploitability: 1.8 / Impact: 5.9
Source: secure@microsoft.com (Secondary)
Description
Integer underflow (wrap or wraparound) in Microsoft Office allows an unauthorized attacker to execute code locally.
Affected (13)
Products: Microsoft: 365 Apps, Microsoft 365, Office 2016, Office 2019, Office 2021, Office 2024
Configuration A
| Vulnerable Software | Affected Versions |
|---|---|
| All versions | |
| All versions | |
| All versions | |
| All versions | |
| All versions | |
| All versions |
Related CWEs
CWE-122
Heap-based Buffer Overflow
A 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-125
Out-of-bounds Read
The product reads data past the end, or before the beginning, of the intended buffer.
CWE-191
Integer Underflow (Wrap or Wraparound)
The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.
References (1)
Source: secure@microsoft.com
PatchVendor Advisory
Timeline
No history available yet.