CVE-2026-57916 PUBLISHED

Arbitrary Path Execution via CPS URI in proCertum SmartSign

Assigner: CERT-PL
Reserved: 26.06.2026 Published: 27.07.2026 Updated: 27.07.2026

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.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N
CVSS Score: 4.6

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Local	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	Low	Integrity	Low
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	Active

CVSS 4.0

Product Status

Vendor	Asseco
Product	proCertum SmartSign
Versions	Default: unaffected affected from 0 to 9.4.3.90 (excl.)

Credits

Mariusz Maik finder

References

Problem Types

CWE-73 External Control of File Name or Path CWE

Impacts

CAPEC-76 Manipulating Web Input to File System Calls