CVE-2026-57917: Asseco Procertum Smartsign

Medium severity, CVSS 4.8. EPSS: 0.2% chance of exploitation in the next 30 days.

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 products

• Asseco Procertum Smartsign: before 9.4.3.90 (fixed in 9.4.3.90)

Published 2026-07-27. Last modified 2026-07-30.