CVE-2021-31337

CRITICAL

SINAMICS SL150, SM150, and SM150i Firmware - Unauthenticated Telnet Access

Title source: llm
STIX 2.1

Description

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).

References (1)

Core 1
Core References
Not Applicable, Third Party Advisory, US Government Resource x_refsource_misc
https://us-cert.cisa.gov/ics/advisories/icsa-21-131-04

Scores

CVSS v3 9.8
EPSS 0.0062
EPSS Percentile 70.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-306
Status published
Products (3)
siemens/sinamics_sl150_firmware
siemens/sinamics_sm150_firmware
siemens/sinamics_sm150i_firmware
Published Jun 28, 2021
Tracked Since Feb 18, 2026