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TI-2026-02142 Aliases CVE-2026-2516GHSA-r996-q9x2-5wwf

Unidocs ezPDF DRM Reader/ezPDF Reader SHFOLDER.dll uncontrolled search path

Priority HIGH 67CWE-426Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
High
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-426.

Summary

A vulnerability was identified in Unidocs ezPDF DRM Reader and ezPDF Reader 2.0/3.0.0.4. This affects an unknown part in the library SHFOLDER.dll. Such manipulation leads to uncontrolled search path. The attack needs to be performed locally. Attacks of this nature are highly complex. It is indicated that the exploitability is difficult. The exploit is publicly available and might be used. Upgrading the affected component is recommended. The vendor explains: "[W]e have already addressed similar DLL search path vulnerability patterns through prior security updates. (...) Users are advised to use the latest version provided by the vendor."

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00133 2nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
UNIDOCSezPDF DRM Reader2.0; 3.0.0.4—No fix listedCNA
UNIDOCSezPDF Reader2.0; 3.0.0.4—No fix listedCNA
  • ezPDF DRM Reader VendorUNIDOCS Affected 2.0; 3.0.0.4 Fixed in — No fix listed CNA
  • ezPDF Reader VendorUNIDOCS Affected 2.0; 3.0.0.4 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-2516
  2. 2026-10-03 Alias added: GHSA-r996-q9x2-5wwf

References

Exploit 1

Patch 1

  • TI-2021-08323 unidocs ezPDFReader arbitrary command execution vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2020-06375 Improper input validation in UNIDOCS ezPDF Reader CVSS 3.1HIGH 7.2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences