CRITICAL

CVE-2021-21821

CVSS v3

9.8

CRITICAL

EPSS Score

2.0 %

exploit probability, as of 2026-10-19

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2021-21821 yet.

Full record on NVD

Description

A stack-based buffer overflow vulnerability exists in the PDF process_fontname functionality of Accusoft ImageGear 19.9. A specially crafted malformed file can lead to code execution. An attacker can provide a malicious file to trigger this vulnerability.

Technical details

Published: 2021-07-08

Frequently asked questions

What is CVE-2021-21821?

Is CVE-2021-21821 actively exploited?

Active exploitation of CVE-2021-21821 has not been confirmed. Its EPSS score was 2.0% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-21821?

CVE-2021-21821 has a CVSS v3 base score of 9.8 (CRITICAL severity).

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