CVE-2021-31340
7.5 · HIGHOverview
CVE-2021-31340 is a high-severity vulnerability affecting siemens simatic_rf166c_firmware. It was published on June 8, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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
Remediation
Check the references section for vendor advisories and patches from siemens. Update simatic_rf166c_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| siemens | simatic_rf166c_firmware | >= 0, < 1.3.2 | Affected |
| siemens | simatic_rf185c_firmware | >= 0, < 1.3.2 | Affected |
| siemens | simatic_rf186c_firmware | >= 0, < 1.3.2 | Affected |
| siemens | simatic_rf186ci_firmware | >= 0, < 1.3.2 | Affected |
| siemens | simatic_rf188c_firmware | >= 0, < 1.3.2 | Affected |
| siemens | simatic_rf188ci_firmware | >= 0, < 1.3.2 | Affected |
| siemens | simatic_rf360r_firmware | >= 0, < 2.0 | Affected |
| siemens | simatic_reader_rf610r_cmiit_firmware | >= 3.0, < 4.0 | Affected |
| siemens | simatic_reader_rf610r_etsi_firmware | >= 3.0, < 4.0 | Affected |
| siemens | simatic_reader_rf610r_fcc_firmware | >= 3.0, < 4.0 | Affected |
Frequently Asked Questions
What is CVE-2021-31340?
CVE-2021-31340 is a high-severity vulnerability affecting siemens simatic_rf166c_firmware. It was published on June 8, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2021-31340?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-31340?
Check the references section for vendor advisories and patches from siemens. Update simatic_rf166c_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-31340?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-31340 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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Browser-based exploitation validates findings with real proof-of-concept.
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