Is CVE-2021-3821 actively exploited?

No active exploitation of CVE-2021-3821 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-3821 be exploited remotely?

Yes. CVE-2021-3821 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-3821?

CVE-2021-3821 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2021-3821

NVD-CWE-noinfoPublished: December 12, 2022· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

A potential security vulnerability has been identified for certain HP multifunction printers (MFPs). The vulnerability may lead to Denial of Service when running HP Workpath solutions on potentially affected products.

NVD Source

Technical Analysis

CVE-2021-3821 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

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 9.8.