CVE-2021-26605: unidocs ezPDFReader arbitrary command execution vulnerability

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-08-05 · updated 2026-06-17
Weakness: CWE-20

Description

An improper input validation vulnerability in the service of ezPDFReader allows attacker to execute arbitrary command. This issue occurred when the ezPDF launcher received and executed crafted input values through JSON-RPC communication.

Affected products

unidocs ezPDFReader: from 2.0 through 3.0

References

https://www.boho.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=36168
https://www.boho.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=36168

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