Arbitrary Path Execution via CPS URI in proCertum SmartSign
CVE-2026-57916

4.6MEDIUM

Key Information:

Vendor

Asseco

Status
Procertum Smartsign
Vendor
CVE Published:
27 July 2026

What is CVE-2026-57916?

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.

Affected Version(s)

proCertum SmartSign 0 < 9.4.3.90

References

https://cert.pl/posts/2026/07/CVE-2026-57916
third-party-advisory
https://pomoc.certum.pl/pl/oprogramowanie/procertum-smart...
product

CVSS V4

Score:
4.6
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Mariusz Maik
.