CVE-2025-66835

TrueConf Client 8.5.2 is vulnerable to DLL hijacking via crafted wfapi.dll allowing local attackers to execute arbitrary code within the user's context

High · published December 30, 2025

CVSS v3.1
7.1
EPSS
0%
Percentile
7.5
In the wild
Unconfirmed
What it is

⚡ Just a single crafted DLL is all it takes! TrueConf Client 8.5.2 is vulnerable to DLL hijacking, allowing local attackers to run arbitrary code in your user's context — yikes! 🔥 Think of it like a sneaky delivery driver dropping off a package that looks official but actually contains a ticking time bomb. If they get the right address, they can cause chaos without you even knowing it! An attacker could exploit this vulnerability to execute any code they desire within the user's environment. This could lead to unauthorized access, data theft, or even complete system control — absolutely devastating scenarios for both users and organizations!

Put simply

Think of it like a sneaky delivery driver dropping off a package that looks official but actually contains a ticking time bomb. If they get the right address, they can cause chaos without you even knowing it! This vulnerability allows local attackers to hijack the wfapi.dll file, executing arbitrary code when the TrueConf Client loads it. The DLL is trusted, meaning it can run malicious commands that compromise the user's system.

What to do

An attacker could exploit this vulnerability to execute any code they desire within the user's environment. This could lead to unauthorized access, data theft, or even complete system control — absolutely devastating scenarios for both users and organizations! Patch TrueConf Client to version 8.5.3 immediately to close this vulnerability. Additionally, ensure that your systems are configured to validate the integrity of DLL files and limit local access whenever possible. You've got this! Fixing this vulnerability will enhance your security posture in no time. 🛡️

The record
Technical detail
CVSS v3.1
7.1 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00183 · 7.5th percentile
Published
2025-12-30T00:00Z
EPSS history
Timeline
  • 30 DEC 00:00Z
    TrueConf Client 8.5.2 is vulnerable to DLL hijacking via crafted wfapi.dll allowing local attackers to execute arbitrary code within the user's context
    cvelistv5