CVE-2026-80302: fallo en Gen Digital Avast Antivirus, Avast One, Avast…
Avast sandbox escape via arbitrary file write in virtualized environment
Publicada el
Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.
0Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Track
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.
Productos afectados
Gen Digital · Avast Antivirus, Avast One, Avast Premium Security, Avast UltimateGen Digital · AVG Antivirus Free, AVG Internet Security, AVG UltimateGen Digital · Norton Antivirus Plus, Norton 360 Standard, Norton 360 Deluxe, Norton 360 AdvancedCVEs relacionadas — Gen Digital Avast Antivirus, Avast One, Avast…
En el mismo producto, de las más peligrosas a las menos.
CVE-2026-82964HIGHAvast sandbox privilege escalation via unpreserved DACLs on virtualized files in aswSnx.sysEPSS 0.2%CVE-2026-80301—Avast sandbox escape via unpreserved COM pathway through Task SchedulerEPSS —CVE-2026-80303—Avast WFP stream parser integer underflow causes system crashEPSS —CVE-2026-12067—AvastSvc denial of service via unhandled JsonCpp exceptions in native message handlersEPSS —