PT-2026-64888 · Asseco · Procertum Smartsign

Mariusz Maik · CVE-2026-57916 · Published 2026-07-27 · Updated 2026-07-27

NVD

CVSS v4.0

4.6

Medium

Base vector

AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:L/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

proCertum SmartSign opens Certificate Practice Statement (CPS) URI without schema validation. An attacker can prepare arbitrary certificate with CPS URI pointing to a local executable file or any URL, sign a document with it, and send it to the victim. When the victim opens the document in the application, the specified file will be executed (or webpage will be opened).

This issue was fixed in version 9.4.3.90.

Fix

Weakness Enumeration

CWE-73

Related Identifiers

CVE-2026-57916

Affected Products

Procertum Smartsign

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-57916 · Security Note
• https://cert.pl/posts/2026/07/CVE-2026-57916 · Note
• https://pomoc.certum.pl/pl/oprogramowanie/procertum-smartsign · Note