CVE-2021-45389: A flaw was found with the JWT token

This month

CRITICAL 9.8REMOTEDOWNGRADEDOWNGRADE

CVE-2021-45389 is a critical-severity flaw (CVSS 9.8) affecting command center, san\&nas. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Weakness	CWE-287
Published	2022-01-04
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: starwind

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-01-04 16:15 UTCPublished CVE record published
2026-06-17 04:13 UTCUpdated Record last modified

starwind command center DOWNGRADE

Affected: 6864

Fixed in: no fixed release known

Safe to downgrade to: a release before 6864

1. Check installed version

apt-cache policy command-center || rpm -q command-center || command-center --version

2. No fixed release: DOWNGRADE to a release before 6864 (Debian / Ubuntu)

apt-cache madison command-center sudo apt install command-center=<VERSION_BEFORE_6864> sudo apt-mark hold command-center

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list command-center sudo dnf downgrade command-center-<VERSION_BEFORE_6864> sudo dnf versionlock add command-center

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

starwind san\&nas DOWNGRADE

Affected: 1578

Fixed in: no fixed release known

Safe to downgrade to: a release before 1578

1. Check installed version

apt-cache policy sannas || rpm -q sannas || sannas --version

2. No fixed release: DOWNGRADE to a release before 1578 (Debian / Ubuntu)

apt-cache madison sannas sudo apt install sannas=<VERSION_BEFORE_1578> sudo apt-mark hold sannas

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list sannas sudo dnf downgrade sannas-<VERSION_BEFORE_1578> sudo dnf versionlock add sannas

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-45389?

command center: downgrade or apply the listed mitigation; san\&nas: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-45389 being exploited?

CVE-2021-45389 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-45389 affect?

CVE-2021-45389 affects command center, san\&nas. Severity is critical (CVSS 9.8). 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

How urgent is CVE-2021-45389?

Priority 56/100. Critical severity; Remotely exploitable, no login, no user action

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References

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