Answer in brief
CVE-2026-80302 records a Unknown severity vulnerability in Avast sandbox escape via arbitrary file write in virtualized environment. The current sources do not mark it as known exploited. The current feed maps Gen Digital/Avast Antivirus, Avast One, Avast Premium Security, Avast Ultimate (generic), Gen Digital/AVG Antivirus Free, AVG Internet Security, AVG Ultimate (generic), Gen Digital/Norton Antivirus Plus, Norton 360 Standard, Norton 360 Deluxe, Norton 360 Advanced (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Gen Digital/Avast Antivirus, Avast One, Avast Premium Security, Avast Ultimate (generic), Gen Digital/AVG Antivirus Free, AVG Internet Security, AVG Ultimate (generic), Gen Digital/Norton Antivirus Plus, Norton 360 Standard, Norton 360 Deluxe, Norton 360 Advanced (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Gen Digital/Avast Antivirus, Avast One, Avast Premium Security, Avast Ultimategeneric | * | Not reported |
| Gen Digital/AVG Antivirus Free, AVG Internet Security, AVG Ultimategeneric | * | Not reported |
| Gen Digital/Norton Antivirus Plus, Norton 360 Standard, Norton 360 Deluxe, Norton 360 Advancedgeneric | * | Not reported |
Published upstream
Nov 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 6, 2026
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.
Quoted source text, attributed separately from HOL analysis.