Avast sandbox escape via arbitrary file write in virtualized environment
CVSS score
—
EPSS probability
%0.2
Risk score
—
Published
1 d ago
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Vulnerability description
DayBreach AI Explanation
Verified against sourcesSources read
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Source agreement
Tam uyum
Evidence confidence
%55
Short explanation
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.
This vulnerability allows attackers to bypass sandbox boundaries and execute code on the host system, compromising overall system security.
What should be done?
- Review the provided patch references
- Update the products
- Follow vendor advisories
Chain of evidence and sources
Avast sanal alan dosya sanallaştırma katmanındaki yetersiz izolasyon, yerel bir saldırganın sanal alan dışına rastgele dosya yazmasına izin verir.
Yazma işlemlerinin yönlendirmeyi atlaması, konak sistem üzerinde kod yürütülmesine yol açar.
Show the technical text from the sources
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.
CWE: CWE-434, CWE-653
This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-80302 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| The sources have not yet published a verified CVSS metric. | ||||
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-80302 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-80302 weaknesses.
Official Sources and Advisories
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Weakness Type (CWE & CAPEC)
Similar Vulnerabilities
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