Is CVE-2021-27440 actively exploited?

No active exploitation of CVE-2021-27440 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-27440 be exploited remotely?

Yes. CVE-2021-27440 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-27440?

CVE-2021-27440 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2021-27440

CWE-259Published: March 25, 2021· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

The software contains a hard-coded password it uses for its own inbound authentication or for outbound communication to external components on the Reason DR60 (all firmware versions prior to 02A04.1).

NVD Source

Technical Analysis

CVE-2021-27440 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.