CVE-2021-45339
HIGHCVSS 7.8/10EPSS 0.32%
Last modified
CVE-2021-45339 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Privilege escalation vulnerability in Avast Antivirus prior to 20.4 allows a local user to gain elevated privileges by "hollowing" trusted process which could lead to the bypassing of Avast self-defense.. EPSS estimates a 0.32% chance of exploitation in the next 30 days.
Description
Privilege escalation vulnerability in Avast Antivirus prior to 20.4 allows a local user to gain elevated privileges by "hollowing" trusted process which could lead to the bypassing of Avast self-defense.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Avast | Antivirus | < 20.4 |
References
- https://github.com/the-deniss/Vulnerability-Disclosures/tree/main/CVE-2021-AVST0Exploit, Third Party Advisory
- https://github.com/the-deniss/Vulnerability-Disclosures/tree/main/CVE-2021-AVST0Exploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-45339?
Privilege escalation vulnerability in Avast Antivirus prior to 20.4 allows a local user to gain elevated privileges by "hollowing" trusted process which could lead to the bypassing of Avast self-defense.
How severe is CVE-2021-45339?
CVE-2021-45339 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.32% probability of exploitation in the next 30 days.
How do I fix CVE-2021-45339?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2021-45339?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST