CVE-2019-11644

Severity: high (CVSS 7.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-05-17 · updated 2026-06-17
Weakness: CWE-427

Description

In the F-Secure installer in F-Secure SAFE for Windows before 17.6, F-Secure Internet Security before 17.6, F-Secure Anti-Virus before 17.6, F-Secure Client Security Standard and Premium before 14.10, F-Secure PSB Workstation Security before 12.01, and F-Secure Computer Protection Standard and Premium before 19.3, a local user can escalate their privileges through a DLL hijacking attack against the installer. The installer writes the file rm.exe to C:\Windows\Temp and then executes it. The rm.exe process then attempts to load several DLLs from its current directory. Non-admin users are able to write to this folder, so an attacker can create a malicious C:\Windows\Temp\OLEACC.dll file. When an admin runs the installer, rm.exe will execute the attacker's DLL in an elevated security context.

Affected products

F-Secure Client Security: before 14.10 — fixed in 14.10
F-Secure Computer Protection: before 19.3 — fixed in 19.3
F-Secure Internet Security: before 17.6 — fixed in 17.6
F-Secure Psb Workstation Security: before 12.01 — fixed in 12.01
F-Secure SAFE Browser for Android Version 18.5: before 17.6 — fixed in 17.6

How to fix

Upgrade to a fixed version: F-Secure Client Security 14.10; F-Secure Computer Protection 19.3; F-Secure Internet Security 17.6; F-Secure Psb Workstation Security 12.01; F-Secure SAFE Browser for Android Version 18.5 17.6. Check the vendor advisory for mitigations.

References

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