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CVE-2026-2516— Unidocs ezPDF DRM Reader/ezPDF Reader SHFOLDER.dll uncontrolled search path

Quick assessment

Affected
Unidocs ezPDF DRM Reader
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Unidocs ezPDF DRM Reader和Unidocs ezPDF Reader都是韩国Unidocs公司的一个PDF阅读器。 Unidocs ezPDF DRM Reader和Unidocs ezPDF Reader 2.0版本、3.0.0.4版本存在代码问题漏洞，该漏洞源于库SHFOLDER.dll中搜索路径不受控制，可能导致本地攻击。

CVSS 7.0 · High EPSS 0.12% · P2

Possible ATT&CK Techniques 1 AI

T1574.002
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I. Basic Information for CVE-2026-2516

Vulnerability Information
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Vulnerability Title
Unidocs ezPDF DRM Reader/ezPDF Reader SHFOLDER.dll uncontrolled search path
Source: CVE Program / CVE List V5
Vulnerability Description
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."
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对搜索路径元素未加控制
Source: CVE Program / CVE List V5
Vulnerability Title
Unidocs ezPDF DRM Reader和Unidocs ezPDF Reader 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Unidocs ezPDF DRM Reader和Unidocs ezPDF Reader都是韩国Unidocs公司的一个PDF阅读器。 Unidocs ezPDF DRM Reader和Unidocs ezPDF Reader 2.0版本、3.0.0.4版本存在代码问题漏洞，该漏洞源于库SHFOLDER.dll中搜索路径不受控制，可能导致本地攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Unidocs ezPDF DRM Reader 2.0 -
Unidocs ezPDF Reader 2.0 -

II. Public POCs for CVE-2026-2516

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III. Intelligence Information for CVE-2026-2516

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IV. Related Vulnerabilities

Same vendor: Unidocs
Same weakness: CWE-427

V. Comments for CVE-2026-2516

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