CVE-2026-80302: Avast sandbox escape via arbitrary file write in virtualized environment
Gen Digital · Avast Antivirus, Avast One, Avast Premium Security, Avast Ultimate
Vendor fix available · Affected: Gen Digital Avast Antivirus, Avast One, Avast Premium Security, Avast Ultimate · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 2% of scored CVEs
DescriptionCVE.org
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.
Affected products3
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- Gen Digital · Avast Antivirus, Avast One, Avast Premium Security, Avast Ultimatebefore 26.7
- Gen Digital · AVG Antivirus Free, AVG Internet Security, AVG Ultimatebefore 26.7
- Gen Digital · Norton Antivirus Plus, Norton 360 Standard, Norton 360 Deluxe, Norton 360 Advancedbefore 26.7
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- Gen Digital
- Published
- November 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-80302 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.