CVE-2026-80302 (GCVE-0-2026-80302)

Vulnerability from cvelistv5 – Published: 2026-11-06 16:00 – Updated: 2026-11-06 16:00
VLAI
Title
Avast sandbox escape via arbitrary file write in virtualized environment
Summary
Insufficient isolation in the Avast sandbox file virtualization layer on Windows allows a local, low-privileged attacker executing inside the sandbox to write arbitrary files outside sandbox containment and execute code on the host. The sandbox virtualizes file system operations by intercepting write requests to protected system directories. However, the virtualization implementation fails to properly validate write targets in certain edge cases, allowing writes to bypass the virtualization redirection and reach the actual host file system in protected locations. An attacker can exploit this to overwrite executable files, system libraries, or startup configurations with arbitrary content, leading to code execution with host privileges on subsequent system operations or reboot.
Severity
No CVSS data available.
CWE
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
  • CWE-653 - Improper Isolation or Compartmentalization
Assigner
GEN CNA under the mitre root
CNA scorecard B 75/100 over 24 records in the last 180 days details
References
Impacted products
Credits
Teng Zheng Wang by VulnGuard Labs
Show details on NVD website
To clipboard 

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