What is CVE-2021-31337?

CVE-2021-31337 is a vulnerability in the Telnet service of the SIMATIC HMI Comfort Panels system component in affected products, which does not require authentication and may allow a remote attacker to gain access to the device if the service is enabled.

What is the severity of CVE-2021-31337?

CVE-2021-31337 has a severity rating of 9.8 (Critical).

Which products are affected by CVE-2021-31337?

CVE-2021-31337 affects Siemens Sinamics SL150 Firmware, Siemens Sinamics SM150 Firmware, and Siemens Sinamics SM150i Firmware.

Is Siemens Sinamics SL150 vulnerable to CVE-2021-31337?

No, Siemens Sinamics SL150 is not vulnerable to CVE-2021-31337.

How can I fix CVE-2021-31337?

To fix CVE-2021-31337, it is recommended to disable the Telnet service if not required or implement authentication mechanisms.

Vulnerability/
CVE-2021-31337

critical

9.8

CWE

306

28/6/2021

3/8/2024

CVE-2021-31337

First published: Mon Jun 28 2021(Updated: )

The Telnet service of the SIMATIC HMI Comfort Panels system component in affected products does not require authentication, which may allow a remote attacker to gain access to the device if the service is enabled. Telnet is disabled by default on the SINAMICS Medium Voltage Products (SINAMICS SL150: All versions, SINAMICS SM150: All versions, SINAMICS SM150i: All versions).

Credit: productcert@siemens.com

Affected Software	Affected Version	How to fix
Siemens Sinamics Sl150 Firmware
Siemens SINAMICS SL150
Siemens Sinamics Sm150 Firmware
Siemens SINAMICS SM150
Siemens Sinamics Sm150i Firmware
Siemens SINAMICS SM150i

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Reference Links

https://us-cert.cisa.gov/ics/advisories/icsa-21-131-04

Frequently Asked Questions

What is CVE-2021-31337?
CVE-2021-31337 is a vulnerability in the Telnet service of the SIMATIC HMI Comfort Panels system component in affected products, which does not require authentication and may allow a remote attacker to gain access to the device if the service is enabled.
What is the severity of CVE-2021-31337?
CVE-2021-31337 has a severity rating of 9.8 (Critical).
Which products are affected by CVE-2021-31337?
CVE-2021-31337 affects Siemens Sinamics SL150 Firmware, Siemens Sinamics SM150 Firmware, and Siemens Sinamics SM150i Firmware.
Is Siemens Sinamics SL150 vulnerable to CVE-2021-31337?
No, Siemens Sinamics SL150 is not vulnerable to CVE-2021-31337.
How can I fix CVE-2021-31337?
To fix CVE-2021-31337, it is recommended to disable the Telnet service if not required or implement authentication mechanisms.

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agent/weakness
agent/severity
agent/references
agent/author
agent/tags
agent/description
agent/softwarecombine
agent/event
collector/mitre-cve
source/MITRE
vendor/siemens
canonical/siemens sinamics sl150 firmware
canonical/siemens sinamics sl150
canonical/siemens sinamics sm150 firmware
canonical/siemens sinamics sm150
canonical/siemens sinamics sm150i firmware
canonical/siemens sinamics sm150i

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