CVE-2021-26605

unidocs ezPDFReader arbitrary command execution vulnerability

CRITICAL

9.8

CVSS Score

Published: August 5, 2021 at 08:22 PM UTC

Updated: June 17, 2026 at 03:43 AM UTC

1 product affected across 1 vendorezPDF Reader· also runs on 1 platform

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Severity

CRITICAL9.8

Exploit prediction

EPSS 1%

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

ezPDF Reader · Unidocs

95%

2.0 ≤ v ≤ 3.02.0 ~ 3.0

microsoft-windows (environment)

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Windows · Microsoft

95%

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_MISCThird Party Advisory

Source: [email protected]

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

CVSS

9.8CRITICAL[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-20

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