CVE-2020-36938 WinAVR Version 20100110 - Insecure Folder Permissions
Insecure folder permissions in WinAVR allow authenticated users to modify critical executables, potentially leading to privilege escalation or code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-36938?
CVE-2020-36938 is a high-severity vulnerability in WinAVR, published on 27 Jan 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
WinAVR version 20100110 contains an insecure permissions vulnerability that allows authenticated users to modify system files and executables. Attackers can leverage the overly permissive access controls to potentially modify critical DLLs and executable files in the WinAVR installation directory.
Weakness: CWE-732
Which versions are affected by CVE-2020-36938?
How do I fix CVE-2020-36938?
No fix has been published for CVE-2020-36938 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-36938 being exploited?
There is no known exploitation of CVE-2020-36938 in the wild and no public exploit code.
Sources
Also known as GHSA-q6mp-f7c6-gwcv.