Description
DLL search path hijacking vulnerability in the UPDF.exe executable for Windows version 1.8.5.0 allows attackers with local access to execute arbitrary code by placing a FREngine.dll file of their choice in the 'C:\Users\<user>\AppData\Local\UPDF\FREngine\Bin64\' directory, which could lead to arbitrary code execution and persistence.
Affected products
updf: updf
References1
- www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabili… Third Party Advisory
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - CVSS 4.0
-
7.0
HIGH
Score source: CNA
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 7 · as of 8 November 2026
- CWE
- CWE-427
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.