High severity7.8NVD Advisory· Published Dec 27, 2021· Updated Jun 17, 2026
CVE-2021-45338
CVE-2021-45338
Description
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.
Affected products
3- Avast/Antivirusdescription
Patches
Vulnerability mechanics
References
4- github.com/the-deniss/Vulnerability-Disclosures/tree/main/CVE-2021-AVST1.1nvdExploitThird Party Advisory
- github.com/the-deniss/Vulnerability-Disclosures/tree/main/CVE-2021-AVST1.2nvdExploitThird Party Advisory
- github.com/the-deniss/Vulnerability-Disclosures/tree/main/CVE-2021-AVST1.3nvdExploitThird Party Advisory
- www.avast.com/hacker-hall-of-fame/en/researcher-david-eade-reports-antitrack-bug-to-avast-0nvdVendor Advisory
News mentions
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