CVE-2026-83782

9.8Critical

Published 13 Oct 2026 · NVD status: Awaiting Analysis · AI triage by gemini-3.8-flash

9.8Critical

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Impact: Full C/I/A compromise
Weakness: CWE-122

Impact

Unauthenticated attackers can execute arbitrary code over the network without user interaction. They only need network reachability to the vulnerable Windows Shell component.

Root cause

A heap-based buffer overflow flaw exists in the Windows Shell component.

Affected systems

Versions not listed — check the vendor advisory.

CVSS v3.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Fix & remediation

Apply the official security update referenced in the Microsoft Security Response Center advisory once published. Restrict inbound network access to Windows endpoints from untrusted networks until patched.

AI-suggested. Run it in staging first and check it against the vendor advisory. Why?

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NVD description

Heap-based buffer overflow in Windows Shell allows an unauthorized attacker to execute code over a network.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83782

Source: nvd.nist.gov/vuln/detail/CVE-2026-83782