CVE-2021-45338

Multiple privilege escalation vulnerabilities in Avast Antivirus prior to 20.4 allow a local user to gain elevated privileges by calling unnecessarily powerful internal methods of the main antivirus service which could lead to the (1) arbitrary file delete, (2) write and (3) reset security.

• https://github.com/the-deniss/Vulnerability-Disclosures/tree/main/CVE-2021-AVST1.1Exploit, Third Party Advisory
• https://github.com/the-deniss/Vulnerability-Disclosures/tree/main/CVE-2021-AVST1.2Exploit, Third Party Advisory
• https://github.com/the-deniss/Vulnerability-Disclosures/tree/main/CVE-2021-AVST1.3Exploit, Third Party Advisory
• https://www.avast.com/hacker-hall-of-fame/en/researcher-david-eade-reports-antitrack-bug-to-avast-0Vendor Advisory
• https://github.com/the-deniss/Vulnerability-Disclosures/tree/main/CVE-2021-AVST1.1Exploit, Third Party Advisory
• https://github.com/the-deniss/Vulnerability-Disclosures/tree/main/CVE-2021-AVST1.2Exploit, Third Party Advisory
• https://github.com/the-deniss/Vulnerability-Disclosures/tree/main/CVE-2021-AVST1.3Exploit, Third Party Advisory
• https://www.avast.com/hacker-hall-of-fame/en/researcher-david-eade-reports-antitrack-bug-to-avast-0Vendor Advisory

Published

Dec 27, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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