CVE-2026-57917
Medium
Description
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.
SeverityMedium
CVSS4.8
Exploit probability—
ProductproCertum SmartSign
PublishedJul 27, 2026
First seenJul 27, 2026
Weakness typeCWE-611XML external entity (XXE)
How to fix
Update
- Asseco proCertum SmartSign9.4.3.90 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Asseco proCertum SmartSign | v < 9.4.3.90 | 9.4.3.90 |
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