Vulnerability in Avast Antivirus
CVE-2021-45337
Privilege escalation vulnerability in the Self-Defense driver of Avast Antivirus prior to 20.8 allows a local user with SYSTEM privileges to gain elevated privileges by "hollowing" process wsc_proxy.exe which could lead to acquire antimalware (AM-PPL) protection.
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 (35.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.1% 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
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-2021-45337?
- CVE-2021-45337 is a high-severity vulnerability in Avast Antivirus. CVSS score: 8.8/10. Published 2021-12-27.
- How severe is CVE-2021-45337?
- High severity. CVSS v3 base score is 8.8 out of 10.