CVE-2021-45339 Privilege escalation in n/a
Local attackers can gain elevated privileges by process hollowing, bypassing Avast self-defense mechanisms.
- 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-2021-45339?
CVE-2021-45339 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 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.
Weakness: CWE-863
Which versions are affected by CVE-2021-45339?
It affects 1 product.
Products include Avast Antivirus.
How do I fix CVE-2021-45339?
No fix has been published for CVE-2021-45339 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-45339 being exploited?
There is no known exploitation of CVE-2021-45339 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-4j2p-j8c6-h5p8.