Is CVE-2021-45389 actively exploited?

No active exploitation of CVE-2021-45389 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-45389 be exploited remotely?

Yes. CVE-2021-45389 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-45389?

CVE-2021-45389 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2021-45389

CWE-287Published: January 4, 2022· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

A flaw was found with the JWT token. A self-signed JWT token could be injected into the update manager and bypass the authentication process, thus could escalate privileges. This affects StarWind SAN and NAS build 1578 and StarWind Command Center build 6864.

NVD Source

Technical Analysis

CVE-2021-45389 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.

From a weakness classification perspective (CWE-287): Authentication bypass vulnerabilities allow attackers to access protected resources without valid credentials.