Vulnerability in Avast Antivirus
CVE-2021-45335
Sandbox component in Avast Antivirus prior to 20.4 has an insecure permission which could be abused by local user to control the outcome of scans, and therefore evade detection or delete arbitrary system files.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (29.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
Weakness classification (CWE)
References
- www.avast.com/hacker-hall-of-fame/en/researcher-david-eade-reports-antitrack-bu… (Vendor Advisory)
- github.com/the-deniss/Vulnerability-Disclosures/tree/main/CVE-2021-AVST3 & CVE-… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-45335?
- CVE-2021-45335 is a high-severity vulnerability in Avast Antivirus, classified under Incorrect Default Permissions. CVSS score: 8.8/10. Published 2021-12-27.
- How severe is CVE-2021-45335?
- High severity. CVSS v3 base score is 8.8 out of 10.