Is CVE-2021-21784 actively exploited?

No active exploitation of CVE-2021-21784 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-21784 be exploited remotely?

No. CVE-2021-21784 requires local access to exploit.

What is the CVSS score of CVE-2021-21784?

CVE-2021-21784 has a CVSS score of 7.8 (HIGH).

HOME VULNERABILITIESCVE-2021-21784

HIGH

CVE-2021-21784

CWE-119Published: April 13, 2021· Updated: Jun 17, 2026

7.8

CVSS v3.1

Official Description

An out-of-bounds write vulnerability exists in the JPG format SOF marker processing of Accusoft ImageGear 19.8. A specially crafted malformed file can lead to memory corruption. An attacker can provide a malicious file to trigger this vulnerability.

NVD Source

Technical Analysis

CVE-2021-21784 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.