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CVE-2021-31340

HIGH
7.5
CVSS Score
Published: June 8, 2021 at 07:47 PM UTC
Updated: June 17, 2026 at 03:51 AM UTC
50 products affected across 1 vendorSIMATIC RF188C FirmwareSIMATIC RF185C FirmwareSIMATIC RF186C Firmware

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Severity
HIGH7.5
Exploit prediction
EPSS 1.0%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

SIMATIC Reader RF610R Cmiit Firmware· Siemens
95%
3.0 ≤ v < 4.0All versions > V3.0 < V4.0
Affected range stops below 4.0, so it looks safe — our inference, not a vendor statement
siemens-simatic-reader-rf610r-cmiit (same device)
SIMATIC Reader RF610R Etsi Firmware· Siemens
95%
3.0 ≤ v < 4.0All versions > V3.0 < V4.0
Affected range stops below 4.0, so it looks safe — our inference, not a vendor statement
siemens-simatic-reader-rf610r-etsi (same device)
SIMATIC Reader RF610R Fcc Firmware· Siemens
95%
3.0 ≤ v < 4.0All versions > V3.0 < V4.0
Affected range stops below 4.0, so it looks safe — our inference, not a vendor statement
siemens-simatic-reader-rf610r-fcc (same device)
SIMATIC Reader RF615R Cmiit Firmware· Siemens
95%
3.0 ≤ v < 4.0All versions > V3.0 < V4.0
Affected range stops below 4.0, so it looks safe — our inference, not a vendor statement
siemens-simatic-reader-rf615r-cmiit (same device)
SIMATIC Reader RF615R Etsi Firmware· Siemens
95%
3.0 ≤ v < 4.0All versions > V3.0 < V4.0
Affected range stops below 4.0, so it looks safe — our inference, not a vendor statement
siemens-simatic-reader-rf615r-etsi (same device)
SIMATIC Reader RF615R Fcc Firmware· Siemens
95%
3.0 ≤ v < 4.0All versions > V3.0 < V4.0
Affected range stops below 4.0, so it looks safe — our inference, not a vendor statement
siemens-simatic-reader-rf615r-fcc (same device)
SIMATIC Reader RF650R Arib Firmware· Siemens
95%
3.0 ≤ v < 4.0All versions > V3.0 < V4.0
Affected range stops below 4.0, so it looks safe — our inference, not a vendor statement
siemens-simatic-reader-rf650r-arib (same device)
SIMATIC Reader RF650R Cmiit Firmware· Siemens
95%
3.0 ≤ v < 4.0All versions > V3.0 < V4.0
Affected range stops below 4.0, so it looks safe — our inference, not a vendor statement
siemens-simatic-reader-rf650r-cmiit (same device)
SIMATIC Reader RF650R Etsi Firmware· Siemens
95%
3.0 ≤ v < 4.0All versions > V3.0 < V4.0
Affected range stops below 4.0, so it looks safe — our inference, not a vendor statement
siemens-simatic-reader-rf650r-etsi (same device)
SIMATIC Reader RF650R Fcc Firmware· Siemens
95%
3.0 ≤ v < 4.0All versions > V3.0 < V4.0
Affected range stops below 4.0, so it looks safe — our inference, not a vendor statement
siemens-simatic-reader-rf650r-fcc (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_MISCMitigationPatchVendor Advisory
Source: [email protected]
https://cert-portal.siemens.com/productcert/pdf/ssa-787292.pdf

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-400

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