Title: CVE-2021-45389 Update Manager vulnerability in StarWind products

Note: StarWind will continue to update this vulnerability as new information becomes available.

Vulnerability ID: SW-2021215-0001

Version: 4.0

Date: 2021-12-15

Status: Final

CVEs: CVE-2021-45389


Update Manager allows authentification with JTW token which is signed with any key.


An attacker could use self-signed JTW token to bypass authentication resulting in escalation of privileges.

Vulnerability Scoring

CVE CVSS 2.0 Score CVSS 3.x Score
CVE-2021-45389 7.5 (HIGH) 9.8 (CRITICAL)




Resource Hyperlink
NVD https://nvd.nist.gov/vuln/detail/CVE-2021-45389

Affected Products: 

StarWind SAN & NAS build 1578

StarWind HCA and Command Center build 6864

Not affected products:

StarWind SAN&NAS build 1381

StarWind SAN&NAS build 1064

StarWind VSAN for Hyper-V (all versions)

StarWind VTL component (all versions for Windows Server)

StarWind V2V (all versions)

StarWind Tape Redirector component (all versions)

StarWind Deduplication Analyzer (all versions)

StarWind rPerf (all versions)

StarWind iSCSI Accelerator (all versions)

StarWind NVMe-oF Initiator (all versions)

Software Versions and Fixes

Fixed in StarWind SAN & NAS v8 R13

Fixed in StarWind Command Center v2 build 7024


Update StarWind HyperConverged Appliance to StarWind Command Center v2 build 7024 or higher

Update to SAN & NAS v8 R13 or higher

Obtaining Software Fixes 

Software updates will be available in StarWind release notes – https://www.starwindsoftware.com/release-notes-build. To update the software, perform the steps described at the following link  – https://knowledgebase.starwindsoftware.com/guidance/upgrading-from-any-starwind-version-to-any-starwind-version/ or contact support to perform an update. You can submit a support request using the following link https://www.starwindsoftware.com/support-form or contact Support directly via email support@starwind.com or via phone +1 617 829 4499.

Status of Notice


StarWind will continue to update information regarding this vulnerability as new details become available.

This vulnerability article should be considered as the single source of current, up-to-date, authorized and accurate information posted by StarWind Software.

Revision History 

Revision # Date Comments
1.0 2021-12-15 Initial Public Release
2.0 2022-03-02 Final Status for Command Center
3.0 2022-06-23 Final Status for SAN & NAS
4.0 2022-10-03 Changed Affected Product