Is CVE-2021-31471 actively exploited?

No active exploitation of CVE-2021-31471 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-31471 be exploited remotely?

No. CVE-2021-31471 requires local access to exploit.

What is the CVSS score of CVE-2021-31471?

CVE-2021-31471 has a CVSS score of 5.5 (MEDIUM).

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MEDIUM

CVE-2021-31471

CWE-125Published: May 7, 2021· Updated: Jun 17, 2026

5.5

CVSS v3.1

Official Description

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Foxit Reader 10.1.1.37576. 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 U3D objects embedded in PDF files. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated object. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the current process. Was ZDI-CAN-12955.

NVD Source

Technical Analysis

CVE-2021-31471 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), with a CVSS base score of 5.5.