CVE-2026-57917: CWE-611 Improper Restriction of XML External Entity Reference in Asseco proCertum SmartSign
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.
AI Analysis
Technical Summary
The vulnerability in Asseco proCertum SmartSign arises from improper restriction of XML external entity references. The product parses external XML entities from maliciously crafted signature files, enabling SSRF and possible local file disclosure depending on parser settings. The vulnerability is exploitable simply by previewing a file in the file selection dialog, without requiring the user to open the file. This XXE vulnerability is identified as CWE-611 and has a CVSS 4.8 (medium) score. The vendor fixed the issue in version 9.4.3.90.
Potential Impact
An attacker can exploit this vulnerability to perform SSRF attacks and potentially read local files on the system running proCertum SmartSign. This could lead to unauthorized information disclosure. The vulnerability is triggered during file preview, increasing the risk of exploitation without explicit user action to open the file.
Mitigation Recommendations
A fix is available in proCertum SmartSign version 9.4.3.90. Users and administrators should upgrade to this version or later to remediate the vulnerability. No other mitigation details are provided; therefore, patching is the primary recommended action.
CVE-2026-57917: CWE-611 Improper Restriction of XML External Entity Reference in Asseco proCertum SmartSign
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.
CVSS v4.0
Score 4.8medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in Asseco proCertum SmartSign arises from improper restriction of XML external entity references. The product parses external XML entities from maliciously crafted signature files, enabling SSRF and possible local file disclosure depending on parser settings. The vulnerability is exploitable simply by previewing a file in the file selection dialog, without requiring the user to open the file. This XXE vulnerability is identified as CWE-611 and has a CVSS 4.8 (medium) score. The vendor fixed the issue in version 9.4.3.90.
Potential Impact
An attacker can exploit this vulnerability to perform SSRF attacks and potentially read local files on the system running proCertum SmartSign. This could lead to unauthorized information disclosure. The vulnerability is triggered during file preview, increasing the risk of exploitation without explicit user action to open the file.
Mitigation Recommendations
A fix is available in proCertum SmartSign version 9.4.3.90. Users and administrators should upgrade to this version or later to remediate the vulnerability. No other mitigation details are provided; therefore, patching is the primary recommended action.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- CERT-PL
- Date Reserved
- 2026-06-26T10:47:10.593Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a673f8f9c2644c7f8f0f16f
Added to database: 07/27/2026, 11:22:55 UTC
Last enriched: 07/30/2026, 01:21:49 UTC
Last updated: 09/10/2026, 16:41:09 UTC
Views: 78
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