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CVE-2026-57916

Arbitrary Path Execution via CPS URI in proCertum SmartSign

MEDIUM
4.6
CVSS Score
Published: July 27, 2026 at 10:29 AM UTC
Updated: October 24, 2026 at 01:10 PM UTC
1 product affected across 1 vendorproCertum SmartSign

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Severity
MEDIUM4.6
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

proCertum SmartSign· Asseco
90%
0 ≤ v < 9.4.3.900
Affected range stops below 9.4.3.90, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

Third Party Advisory
Source: cverecord
https://cert.pl/posts/2026/07/CVE-2026-57916
Product
Source: cverecord
https://pomoc.certum.pl/pl/oprogramowanie/procertum-smartsign/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.6MEDIUMCERT-PL
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-73

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