Improper Restriction of XML External Entity Reference in proCertum SmartSign
CVE-2026-57917

4.8MEDIUM

Key Information:

Vendor

Asseco

Status
Procertum Smartsign
Vendor
CVE Published:
27 July 2026

What is CVE-2026-57917?

proCertum SmartSign parses external XML entities from arbitrary crafted signature files, enabling SSRF and potentially allowing the reading of local files, depending on the parser's configuration. The XML External Entity (XXE) vulnerability is triggered simply by previewing a file in the file selection window, before the victim clicks “Open”.

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:
4.8
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
.