Is CVE-2021-31476 actively exploited?

No active exploitation of CVE-2021-31476 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-31476 be exploited remotely?

No. CVE-2021-31476 requires local access to exploit.

What is the CVSS score of CVE-2021-31476?

CVE-2021-31476 has a CVSS score of 7.8 (HIGH).

HOME VULNERABILITIESCVE-2021-31476

HIGH

CVE-2021-31476

CWE-843Published: June 16, 2021· Updated: Jun 17, 2026

7.8

CVSS v3.1

Official Description

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PhantomPDF 10.1.3.37598. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the handling of XFA templates. The issue results from the lack of proper validation of user-supplied data, which can result in a type confusion condition. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-13531.

NVD Source

Technical Analysis

CVE-2021-31476 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.