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High severity8.8NVD Advisory· Published Dec 27, 2021· Updated Jun 17, 2026

CVE-2021-45336

CVE-2021-45336

Description

Privilege escalation vulnerability in the Sandbox component of Avast Antivirus prior to 20.4 allows a local sandboxed code to gain elevated privileges by using system IPC interfaces which could lead to exit the sandbox and acquire SYSTEM privileges.

Affected products

3
  • Avast\!/Antivirusllm-fuzzy3 versions
    <20.4+ 2 more
    • (no CPE)range: <20.4
    • (no CPE)
    • cpe:2.3:a:avast:antivirus:*:*:*:*:*:*:*:*range: <20.4

Patches

Vulnerability mechanics

References

2

News mentions

0

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