CVE-2026-83580

7.0High

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

7.0High

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

Impact

A local attacker with an existing account can execute code with elevated privileges on the system. They require local access to run an exploit targeting the caching service.

Root cause

A heap-based buffer overflow flaw exists in the Windows Client-Side Caching (CSC) Service.

Affected systems

Versions not listed — check the vendor advisory.

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

Fix & remediation

Apply the official security update from Microsoft for the Windows Client-Side Caching Service; if patching must wait, disable the Offline Files (CSC) service via Group Policy or the registry.

shell

$ Get-Service -Name CscService | Select-Object -Property Name, Status, StartType

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 Client-Side Caching (CSC) Service allows an authorized attacker to elevate privileges locally.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83580

Source: nvd.nist.gov/vuln/detail/CVE-2026-83580