Arbitrary Path Execution via CPS URI in proCertum SmartSign
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Active
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA proCertum SmartSign (Asseco) Fixed in 9.4.3.90
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Asseco proCertum SmartSign 9.4.3.90
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2026-41696 Improper Restriction of XML External Entity Reference in proCertum SmartSignPriority LOW 21
Timeline
- 2026-10-02 Threatist record created from CVE-2026-57916
- 2026-10-03 Alias added: GHSA-m7cq-h27p-hwp4
References
More Asseco vulnerabilities
- TI-2022-10314 The Reporting module in Aseco Lietuva document management system DVS Avilys before 3.5.58… CVSS 3.1HIGH 7.5
- TI-2025-41095 Local File Inclusion in Contact Plan, E-Mail, SMS and Fax components in Asseco SEE Live… CVSS 3.1MEDIUM 6.5
- TI-2025-07603 Recoverable passwords in Asseco Infomedica Plus CVSS 4.0MEDIUM 5.9
- TI-2025-04109 Information disclosure via IDOR in Asseco AMDX CVSS 4.0MEDIUM 5.3
- TI-2025-07602 Improper Access Control in Asseco Infomedica Plus CVSS 4.0MEDIUM 5.1
- TI-2026-41696 Improper Restriction of XML External Entity Reference in proCertum SmartSign CVSS 4.0MEDIUM 4.8
Sources
- CVE-2026-57916 · CVE Program
- CVE-2026-57916 · NVD
- FIRST EPSS
- GHSA-m7cq-h27p-hwp4 · GitHub Advisory Database · CC BY 4.0
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