CVE-2026-33156 DLL Sideloading in ScreenToGif
Attackers can execute arbitrary code by placing a malicious version.dll in the application directory when running the portable ScreenToGif executable.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-33156?
CVE-2026-33156 is a high-severity code injection vulnerability in NickeManarin ScreenToGif, published on 20 Mar 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
ScreenToGif is a screen recording tool. In versions from 2.42.1 and prior, ScreenToGif is vulnerable to DLL sideloading via version.dll . When the portable executable is run from a user-writable directory, it loads version.dll from the application directory instead of the Windows System32 directory, allowing arbitrary code execution in the user's context. This is especially impactful because ScreenToGif is primarily distributed as a portable application intended to be run from user-writable locations. At time of publication, there are no publicly available patches.
Which versions are affected by CVE-2026-33156?
It affects 1 product.
Products include Screentogif Screentogif.
How do I fix CVE-2026-33156?
No fix has been published for CVE-2026-33156 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-33156 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-33156 exists.
Sources
Also known as GHSA-3fmj-j696-9mg2.