{"id":"CVE-2021-45336","aliases":["EUVD-2021-32109","GHSA-m6f5-297g-9hqj"],"status":"published","title":"Privilege escalation vulnerability in the Sandbox component of Avast Antivirus prior to 20.4...","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.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.00471,"percentile":0.41029,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-269"],"published":"2021-12-27T12:35:42Z","modified":"2026-06-17T04:13:16Z","products":[{"vendor":"avast","product":"antivirus"}],"references":[{"url":"https://www.avast.com/hacker-hall-of-fame/en/researcher-david-eade-reports-antitrack-bug-to-avast-0","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://github.com/the-deniss/Vulnerability-Disclosures/tree/main/CVE-2021-AVST3%20%26%20CVE-2021-AVST4%20%26%20CVE-2021-AVST5","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-45336"},{"url":"https://github.com/advisories/GHSA-m6f5-297g-9hqj"}],"sources":{"cve":[{"id":"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.","status":"published","published":"2021-12-27T12:35:42Z","modified":"2024-08-04T04:39:20.536Z","updated_at":"2026-11-02T14:33:02.580561Z"}],"euvd":[{"id":"EUVD-2021-32109","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.","status":"published","published":"2021-12-27T12:35:42Z","modified":"2024-08-04T04:39:20Z","updated_at":"2026-11-03T03:08:27.448176Z"}],"ghsa":[{"id":"GHSA-m6f5-297g-9hqj","title":"Privilege escalation vulnerability in the Sandbox component of Avast Antivirus prior to 20.4...","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.","status":"published","published":"2021-12-28T00:00:32Z","modified":"2023-01-27T05:01:30Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T14:41:54.261914Z"}],"nvd":[{"id":"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.","status":"published","published":"2021-12-27T14:15:07.75Z","modified":"2026-06-17T04:13:16.987Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":7.2,"vector":"AV:L/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:07:02.977492Z"}]}}