01 Record
CVE-2021-31337
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
UnratedPUBLISHEDCNA: siemens
CNA base scoreUnratedNo CNA CVSS vector
02 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
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 1.67% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 76.4% of scored records. A rank, not a probability.
- NVD base score
- 9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2021-06-28 12:24Z5 YR AGO
- Last updated
- 2024-08-03 22:55Z2 YR AGO
- Reserved
- 2021-04-15
- Assigning CNA
- siemens
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-306Missing Authentication for Critical FunctionBase
- Data version
- 5.1
- Document digest
- c714c103a4e8d7b966356fa2fb7c53e3640ad46022b9efadbd7b8c3cba647b6a
05 Affected products
VendorProductVersionsPlatforms
n/aSINAMICS Medium Voltage ProductsSINAMICS SL150: All versions, SINAMICS SM150: All versions, SINAMICS SM150i: All versions—
06 References
- us-cert.cisa.govhttps://us-cert.cisa.gov/ics/advisories/icsa-21-131-04