CVE-2026-4255 DLL Injection Privilege Escalation
Local attackers can escalate privileges by placing a malicious DLL in a user-writable directory, causing the application to load it with administrative rights.
- 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-2026-4255?
CVE-2026-4255 is a high-severity vulnerability in thermalright TR-VISION HOME, published on 16 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
A DLL search order hijacking vulnerability in Thermalright TR-VISION HOME on Windows (64-bit) allows a local attacker to escalate privileges via DLL side-loading. The application loads certain dynamic-link library (DLL) dependencies using the default Windows search order, which includes directories that may be writable by non-privileged users.\n\n\n\nBecause these directories can be modified by unprivileged users, an attacker can place a malicious DLL with the same name as a legitimate dependency in a directory that is searched before trusted system locations. When the application is executed, which is always with administrative privileges, the malicious DLL is loaded instead of the legitimate library.\n\n\n\nThe application does not enforce restrictions on DLL loading locations and does not verify the integrity or digital signature of loaded libraries. As a result, attacker-controlled code may be executed within the security context of the application, allowing arbitrary code execution with elevated privileges.\n\n\n\nSuccessful exploitation requires that an attacker place a crafted malicious DLL in a user-writable directory that is included in the application's DLL search path and then cause the affected application to be executed. Once loaded, the malicious DLL runs with the same privileges as the application.\n\n\n\nThis issue affects \nTR-VISION HOME versions up to and including 2.0.5.
Weakness: CWE-829
Which versions are affected by CVE-2026-4255?
It affects 1 product.
Products include Thermalright Tr-Vision Home.
How do I fix CVE-2026-4255?
No fix has been published for CVE-2026-4255 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-4255 being exploited?
There is no known exploitation of CVE-2026-4255 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-f62h-6jmm-8r9r.