CVE-2021-45337 Privilege escalation in n/a
A local attacker with SYSTEM privileges can escalate to AM-PPL protection by hollowing a specific process in Avast Antivirus.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-45337?
CVE-2021-45337 is a high-severity vulnerability in n/a, published on 27 Dec 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2021-45337?
It affects 1 product.
Products include Avast Antivirus.
How do I fix CVE-2021-45337?
No fix has been published for CVE-2021-45337 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-45337 being exploited?
There is no known exploitation of CVE-2021-45337 in the wild and no public exploit code.
Other vulnerabilities in n/a
- CVE-2025-13032 Race condition in (Free/Inernet Security/Ultimate) Antivirus
- CVE-2020-10867 Security feature bypass in n/a
- CVE-2017-8307 Missing authorization in n/a
- CVE-2025-3500 Integer Overflow in Avast Antiviurs 25.1.981.6 on Windows may result in privilege escalation
- CVE-2021-45335 Missing authorization in n/a
Sources
Also known as GHSA-p4fv-c2p2-rfjh.