CVE-2021-45335 Missing authorization in n/a
Local attackers can exploit insecure permissions in the Avast Antivirus sandbox to evade detection or delete arbitrary system files.
- 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-2021-45335?
CVE-2021-45335 is a high-severity missing authorization 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
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.
Weakness: CWE-276
Which versions are affected by CVE-2021-45335?
It affects 1 product.
Products include Avast Antivirus.
How do I fix CVE-2021-45335?
No fix has been published for CVE-2021-45335 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2021-45335 being exploited?
There is no known exploitation of CVE-2021-45335 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-2021-45336 Privilege escalation vulnerability in the Sandbox component of Avast Antivirus prior to 20.4 allows a local sandboxed code to gain elevated
Sources
Also known as GHSA-gjmr-rw74-6fvm.