CVE-2021-31337

moderate-risk
Published 2021-06-28

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).

Do I need to act?

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0.62% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (3)

Sinamics Sl150 Firmware
Sinamics Sm150 Firmware
Sinamics Sm150I Firmware

Affected Vendors

Siemens

References (2)

Not Applicable https://us-cert.cisa.gov/ics/advisories/icsa-21-131-04
Not Applicable https://us-cert.cisa.gov/ics/advisories/icsa-21-131-04
43
/ 100
moderate-risk
Severity 32/34 · Critical
Exploitability 2/34 · Minimal
Exposure 9/34 · Low