CVE-2021-26605

Name: CVE-2021-26605
Creator: NVD / NIST
Published: 2021-08-05T21:15:11.82+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.05%

Last modified Jun 17, 2026

CVE-2021-26605 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 1.05% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.05%

59.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Unidocs	Ezpdfreader	>= 2.0, <= 3.0

References

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

Timeline

Published: Aug 5, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-26605?

How severe is CVE-2021-26605?

CVE-2021-26605 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.05% probability of exploitation in the next 30 days.

How do I fix CVE-2021-26605?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-26605?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST