CVE-2026-108426
8.8HighPublished 15 Oct 2026 · NVD status: Awaiting Analysis · AI triage by gemini-3.8-flash
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
- Impact
- Full C/I/A compromise
- Weakness
- CWE-122
Impact
Attackers can achieve arbitrary code execution in the context of the current user. Exploitation requires convincing a user to open a crafted Word document over the network.
Root cause
A heap-based buffer overflow flaw exists in Microsoft Office Word when processing document data.
Affected systems
Versions not listed — check the vendor advisory.
CVSS v3.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Fix & remediation
Install the security update from Microsoft for Microsoft Word as outlined in advisory CVE-2026-108426; block untrusted Word attachments at the email gateway or open untrusted documents in Application Guard/Protected View if patching must wait.
AI-suggested. Run it in staging first and check it against the vendor advisory. Why?
NVD description
Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.