CVE-2020-9295 Security feature bypass in FortiClientWindows
Malformed RAR archives may bypass initial detection in FortiClient and FortiOS, requiring real-time scanning or specific features to catch malicious files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-9295?
CVE-2020-9295 is a medium-severity vulnerability in Fortinet FortiClientWindows, published on 17 Mar 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
FortiOS 6.2 running AV engine version 6.00142 and below, FortiOS 6.4 running AV engine version 6.00144 and below and FortiClient 6.2 running AV engine version 6.00137 and below may not immediately detect certain types of malformed or non-standard RAR archives, potentially containing malicious files. Based on the samples provided, FortiClient will detect the malicious files upon trying extraction by real-time scanning and FortiGate will detect the malicious archive if Virus Outbreak Prevention is enabled.
Weakness: CWE-358
Which versions are affected by CVE-2020-9295?
It affects 1 product.
Products include Fortinet Antivirus Engine.
How do I fix CVE-2020-9295?
No fix has been published for CVE-2020-9295 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-9295 being exploited?
There is no known exploitation of CVE-2020-9295 in the wild and no public exploit code.
Other vulnerabilities in Fortinet FortiClientWindows
Sources
Also known as GHSA-mf6m-3qv8-qp4q.