AUGUST 4, 2026
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Case File

CVE-2021-31337

CRITICAL · CVSS 9.8 EPSS 1.68%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-06-28 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

CVE
CVE-2021-31337
Severity
CRITICAL
CVSS
9.8
EPSS
1.68%

Original NVD 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).