CVE-2021-31340

A vulnerability has been identified in SIMATIC RF166C (All versions > V1.1 and < V1.3.2), SIMATIC RF185C (All versions > V1.1 and <…

High7.5EPSS 0.99%

Published: 8 Jun 2021
Updated: 3 Aug 2024
Reserved: 15 Apr 2021
Assigned by: siemens

Description

A vulnerability has been identified in SIMATIC RF166C (All versions > V1.1 and < V1.3.2), SIMATIC RF185C (All versions > V1.1 and < V1.3.2), SIMATIC RF186C (All versions > V1.1 and < V1.3.2), SIMATIC RF186CI (All versions > V1.1 and < V1.3.2), SIMATIC RF188C (All versions > V1.1 and < V1.3.2), SIMATIC RF188CI (All versions > V1.1 and < V1.3.2), SIMATIC RF360R (All versions < V2.0), SIMATIC Reader RF610R CMIIT (All versions > V3.0 < V4.0), SIMATIC Reader RF610R ETSI (All versions > V3.0 < V4.0), SIMATIC Reader RF610R FCC (All versions > V3.0 < V4.0), SIMATIC Reader RF615R CMIIT (All versions > V3.0 < V4.0), SIMATIC Reader RF615R ETSI (All versions > V3.0 < V4.0), SIMATIC Reader RF615R FCC (All versions > V3.0 < V4.0), SIMATIC Reader RF650R ARIB (All versions > V3.0 < V4.0), SIMATIC Reader RF650R CMIIT (All versions > V3.0 < V4.0), SIMATIC Reader RF650R ETSI (All versions > V3.0 < V4.0), SIMATIC Reader RF650R FCC (All versions > V3.0 < V4.0), SIMATIC Reader RF680R ARIB (All versions > V3.0 < V4.0), SIMATIC Reader RF680R CMIIT (All versions > V3.0 < V4.0), SIMATIC Reader RF680R ETSI (All versions > V3.0 < V4.0), SIMATIC Reader RF680R FCC (All versions > V3.0 < V4.0), SIMATIC Reader RF685R ARIB (All versions > V3.0 < V4.0), SIMATIC Reader RF685R CMIIT (All versions > V3.0 < V4.0), SIMATIC Reader RF685R ETSI (All versions > V3.0 < V4.0), SIMATIC Reader RF685R FCC (All versions > V3.0 < V4.0). Affected devices do not properly handle large numbers of incoming connections. An attacker may leverage this to cause a Denial-of-Service situation.

Scores

CVSS scores of CVE-2021-31340, by who scored it
Scored by	CVSS	Score	Vector
NVDNVD · Modified	3.1	High7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS (exploitation in 30 days): 0.99% · top 37% of all CVEs (6 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.

Weakness

CWE-400: Uncontrolled Resource Consumption (opens in a new tab)All about CWE-400 and its CVEs

Affected products

Siemens · SIMATIC RF166C
- affected All versions > V1.1 and < V1.3.2
Siemens · SIMATIC RF185C
- affected All versions > V1.1 and < V1.3.2
Siemens · SIMATIC RF186C
- affected All versions > V1.1 and < V1.3.2
Siemens · SIMATIC RF186CI
- affected All versions > V1.1 and < V1.3.2
Siemens · SIMATIC RF188C
- affected All versions > V1.1 and < V1.3.2
Siemens · SIMATIC RF188CI
- affected All versions > V1.1 and < V1.3.2
Siemens · SIMATIC RF360R
- affected All versions < V2.0
Siemens · SIMATIC Reader RF610R CMIIT
- affected All versions > V3.0 < V4.0
Siemens · SIMATIC Reader RF610R ETSI
- affected All versions > V3.0 < V4.0
Siemens · SIMATIC Reader RF610R FCC
- affected All versions > V3.0 < V4.0
Siemens · SIMATIC Reader RF615R CMIIT
- affected All versions > V3.0 < V4.0
Siemens · SIMATIC Reader RF615R ETSI
- affected All versions > V3.0 < V4.0
Siemens · SIMATIC Reader RF615R FCC
- affected All versions > V3.0 < V4.0
Siemens · SIMATIC Reader RF650R ARIB
- affected All versions > V3.0 < V4.0
Siemens · SIMATIC Reader RF650R CMIIT
- affected All versions > V3.0 < V4.0
Siemens · SIMATIC Reader RF650R ETSI
- affected All versions > V3.0 < V4.0
Siemens · SIMATIC Reader RF650R FCC
- affected All versions > V3.0 < V4.0
Siemens · SIMATIC Reader RF680R ARIB
- affected All versions > V3.0 < V4.0
Siemens · SIMATIC Reader RF680R CMIIT
- affected All versions > V3.0 < V4.0
Siemens · SIMATIC Reader RF680R ETSI
- affected All versions > V3.0 < V4.0
Siemens · SIMATIC Reader RF680R FCC
- affected All versions > V3.0 < V4.0
Siemens · SIMATIC Reader RF685R ARIB
- affected All versions > V3.0 < V4.0
Siemens · SIMATIC Reader RF685R CMIIT
- affected All versions > V3.0 < V4.0
Siemens · SIMATIC Reader RF685R ETSI
- affected All versions > V3.0 < V4.0
Siemens · SIMATIC Reader RF685R FCC
- affected All versions > V3.0 < V4.0

References (1)

https://cert-portal.siemens.com/productcert/pdf/ssa-787292.pdf (opens in a new tab)x_refsource_MISCx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

[![CVE-2021-31340](https://trackcve.app/badge/CVE-2021-31340.svg)](https://trackcve.app/cve/CVE-2021-31340)

Record last updated 3 Aug 2024, 22:55 UTC.