CVSS 3.1
7.8 highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HCVE-2021-45338
High (7.8) in avast antivirus. EPSS 0.4% chance of exploitation in the next 30 days.
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.
Severity
- EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 33% of CVEs (scores of 2026-10-31)
- Published
- Modified
- Record from
- the NVD, synced
Affected
- avast:antivirus
References
- https://github.com/the-deniss/Vulnerability-Disclosures/tree/main/CVE-2021-AVST1.1
- https://github.com/the-deniss/Vulnerability-Disclosures/tree/main/CVE-2021-AVST1.2
- https://github.com/the-deniss/Vulnerability-Disclosures/tree/main/CVE-2021-AVST1.3
- https://www.avast.com/hacker-hall-of-fame/en/researcher-david-eade-reports-antitrack-bug-to-avast-0
- https://github.com/the-deniss/Vulnerability-Disclosures/tree/main/CVE-2021-AVST1.1