CVE-2021-31340

HIGH

Siemens Simatic Rf166c Firmware < 1.3.2 - Denial of Service

Title source: rule
STIX 2.1

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.

References (1)

Core 1
Core References
Mitigation, Patch, Vendor Advisory x_refsource_misc
https://cert-portal.siemens.com/productcert/pdf/ssa-787292.pdf

Scores

CVSS v3 7.5
EPSS 0.0048
EPSS Percentile 65.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-400
Status published
Products (25)
siemens/simatic_reader_rf610r_cmiit_firmware 3.0 - 4.0
siemens/simatic_reader_rf610r_etsi_firmware 3.0 - 4.0
siemens/simatic_reader_rf610r_fcc_firmware 3.0 - 4.0
siemens/simatic_reader_rf615r_cmiit_firmware 3.0 - 4.0
siemens/simatic_reader_rf615r_etsi_firmware 3.0 - 4.0
siemens/simatic_reader_rf615r_fcc_firmware 3.0 - 4.0
siemens/simatic_reader_rf650r_arib_firmware 3.0 - 4.0
siemens/simatic_reader_rf650r_cmiit_firmware 3.0 - 4.0
siemens/simatic_reader_rf650r_etsi_firmware 3.0 - 4.0
siemens/simatic_reader_rf650r_fcc_firmware 3.0 - 4.0
... and 15 more
Published Jun 08, 2021
Tracked Since Feb 18, 2026