What’s Vulnerable › Vulnerabilities

CVE-2026-41447: FirmaCheck < 1.3.16 DLL Hijacking via Unvalidated OpenSSL Configuration Path

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-03 · updated 2026-10-23
• Weakness: CWE-426

Description

FirmaCheck for Windows before 1.3.16 contains a DLL hijacking vulnerability that allows local attackers to execute arbitrary code by placing a crafted openssl.cnf file in the unvalidated C:\Program Files (x86)\Common Files\SSL\ directory path. Attackers can write a malicious OpenSSL configuration file referencing an attacker-controlled DLL to achieve code execution at startup process privilege level when FirmaCheck.exe runs automatically at system startup.

Affected products

• Zucchetti S.p.a. FirmaCheck: before 1.3.16 — fixed in 1.3.16

How to fix

Upgrade to a fixed version: Zucchetti S.p.a. FirmaCheck 1.3.16. Check the vendor advisory for mitigations.

References

• https://www.vulncheck.com/advisories/firmacheck-dll-hijacking-via-unvalidated-openssl-configuration-path
• https://www.zucchetti.it/it/cms/soluzioni/gestione-documentale/firme-e-marche/software-gestione-firme-digitali-firmacheck/software-gratuito-gestione-firme-e-documenti-descrizione.html

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