What is the severity of CVE-2021-27734?

The severity of CVE-2021-27734 is critical with a CVSS score of 9.8.

How can remote attackers exploit CVE-2021-27734?

Remote attackers can exploit CVE-2021-27734 to change the credentials of existing users.

Which products are affected by CVE-2021-27734?

Hirschmann HiOS versions 07.1.01, 07.1.02, and 08.1.00 through 08.5.xx, and HiSecOS versions 03.3.00 through 03.5.01 are affected by CVE-2021-27734.

How can I fix CVE-2021-27734?

It is recommended to update to versions 08.6.00 for Hirschmann HiOS and 03.5.01 for HiSecOS to fix CVE-2021-27734.

Where can I find more information about CVE-2021-27734?

You can find more information about CVE-2021-27734 at the following link: [link](https://dam.belden.com/dmm3bwsv3/assetstream.aspx?assetid=12914&mediaformatid=50063&destinationid=10016)

Vulnerability/
CVE-2021-27734

critical

9.8

CWE

287

17/5/2021

3/8/2024

CVE-2021-27734

First published: Mon May 17 2021(Updated: )

Hirschmann HiOS 07.1.01, 07.1.02, and 08.1.00 through 08.5.xx and HiSecOS 03.3.00 through 03.5.01 allow remote attackers to change the credentials of existing users.

Credit: cve@mitre.org

Affected Software	Affected Version	How to fix
Belden Hirschmann HIOS	>=08.1.00<08.6.00
Belden Hirschmann HIOS	=07.1.01
Belden Hirschmann HIOS	=07.1.02
Belden HiSecOS	>=03.3.00<=03.5.01

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Reference Links

https://dam.belden.com/dmm3bwsv3/assetstream.aspx?assetid=12914&mediaformatid=50063&destinationid=10016

Frequently Asked Questions

What is the severity of CVE-2021-27734?
The severity of CVE-2021-27734 is critical with a CVSS score of 9.8.
How can remote attackers exploit CVE-2021-27734?
Remote attackers can exploit CVE-2021-27734 to change the credentials of existing users.
Which products are affected by CVE-2021-27734?
Hirschmann HiOS versions 07.1.01, 07.1.02, and 08.1.00 through 08.5.xx, and HiSecOS versions 03.3.00 through 03.5.01 are affected by CVE-2021-27734.
How can I fix CVE-2021-27734?
It is recommended to update to versions 08.6.00 for Hirschmann HiOS and 03.5.01 for HiSecOS to fix CVE-2021-27734.
Where can I find more information about CVE-2021-27734?
You can find more information about CVE-2021-27734 at the following link: [link](https://dam.belden.com/dmm3bwsv3/assetstream.aspx?assetid=12914&mediaformatid=50063&destinationid=10016)

agent/type
agent/softwarecombine
collector/mitre-cve
source/MITRE
agent/weakness
agent/author
agent/last-modified-date
agent/references
agent/severity
agent/description
agent/first-publish-date
agent/event
agent/source
agent/tags
collector/nvd-index
agent/software-canonical-lookup-request
vendor/belden
canonical/belden hirschmann hios
version/belden hirschmann hios/08.1.00
version/belden hirschmann hios/07.1.01
version/belden hirschmann hios/07.1.02
canonical/belden hisecos
version/belden hisecos/03.3.00
version/belden hisecos/03.5.01

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