Siemens RUGGEDCOM: Inadequate Encryption Strength (CVE-2021-37209)
Published Sources: Siemens ProductCERT, CVE.org
What is affected, what to do
A vulnerability has been identified in RUGGEDCOM i800 (All versions < V4.3.8), RUGGEDCOM i801 (All versions < V4.3.8), RUGGEDCOM i802 (All versions < V4.3.8), RUGGEDCOM i803 (All versions < V4.3.8), RUGGEDCOM M2100 (All versions < V4.3.8), RUGGEDCOM M2200 (All versions < V4.3.8), RUGGEDCOM M969 (All versions < V4.3.8), RUGGEDCOM RMC30 (All versions < V4.3.8), RUGGEDCOM RMC8388 V4.X (All versions < V4.3.8), RUGGEDCOM RMC8388 V5.X (All versions < V5.7.0), RUGGEDCOM RP110 (All versions < V4.3.8), RUGGEDCOM RS1600 (All versions < V4.3.8), RUGGEDCOM RS1600F (All versions < V4.3.8), RUGGEDCOM RS1600T (All versions < V4.3.8), RUGGEDCOM RS400 (All versions < V4.3.8), RUGGEDCOM RS401 (All versions < V4.3.8), RUGGEDCOM RS416 (All versions < V4.3.8), RUGGEDCOM RS416P (All versions < V4.3.8), RUGGEDCOM RS416Pv2 V4.X (All versions < V4.3.8), RUGGEDCOM RS416Pv2 V5.X (All versions < V5.7.0), RUGGEDCOM RS416v2 V4.X (All versions < V4.3.8), RUGGEDCOM RS416v2 V5.X (All versions < V5.7.0), RUGGEDCOM RS8000 (All versions < V4.3.8), RUGGEDCOM RS8000A (All versions < V4.3.8), RUGGEDCOM RS8000H (All versions < V4.3.8), RUGGEDCOM RS8000T (All versions < V4.3.8), RUGGEDCOM RS900 (All versions < V4.3.8), RUGGEDCOM RS900 (32M) V4.X (All versions < V4.3.8), RUGGEDCOM RS900 (32M) V5.X (All versions < V5.7.0), RUGGEDCOM RS900G (All versions < V4.3.8), RUGGEDCOM RS900G (32M) V4.X (All versions < V4.3.8), RUGGEDCOM RS900G (32M) V5.X (All versions < V5.7.0), RUGGEDCOM RS900GP (All versions < V4.3.8), RUGGEDCOM RS900L (All versions < V4.3.8), RUGGEDCOM RS900M-GETS-C01 (All versions < V4.3.8), RUGGEDCOM RS900M-GETS-XX (All versions < V4.3.8), RUGGEDCOM RS900M-STND-C01 (All versions < V4.3.8), RUGGEDCOM RS900M-STND-XX (All versions < V4.3.8), RUGGEDCOM RS900W (All versions < V4.3.8), RUGGEDCOM RS910 (All versions < V4.3.8), RUGGEDCOM RS910L (All versions < V4.3.8), RUGGEDCOM RS910W (All versions < V4.3.8), RUGGEDCOM RS920L (All versions < V4.3.8), RUGGEDCOM RS920W (All versions < V4.3.8), RUGGEDCOM RS930L (All versions < V4.3.8), RUGGEDCOM RS930W (All versions < V4.3.8), RUGGEDCOM RS940G (All versions < V4.3.8), RUGGEDCOM RS969 (All versions < V4.3.8), RUGGEDCOM RSG2100 (All versions < V4.3.8), RUGGEDCOM RSG2100 (32M) V4.X (All versions < V4.3.8), RUGGEDCOM RSG2100 (32M) V5.X (All versions < V5.7.0), RUGGEDCOM RSG2100P (All versions < V4.3.8), RUGGEDCOM RSG2100P (32M) V4.X (All versions < V4.3.8), RUGGEDCOM RSG2100P (32M) V5.X (All versions < V5.7.0), RUGGEDCOM RSG2200 (All versions < V4.3.8), RUGGEDCOM RSG2288 V4.X (All versions < V4.3.8), RUGGEDCOM RSG2288 V5.X (All versions < V5.7.0), RUGGEDCOM RSG2300 V4.X (All versions < V4.3.8), RUGGEDCOM RSG2300 V5.X (All versions < V5.7.0), RUGGEDCOM RSG2300P V4.X (All versions < V4.3.8), RUGGEDCOM RSG2300P V5.X (All versions < V5.7.0), RUGGEDCOM RSG2488 V4.X (All versions < V4.3.8), RUGGEDCOM RSG2488 V5.X (All versions < V5.7.0), RUGGEDCOM RSG907R (All versions < V5.7.0), RUGGEDCOM RSG908C (All versions < V5.7.0), RUGGEDCOM RSG909R (All versions < V5.7.0), RUGGEDCOM RSG910C (All versions < V5.7.0), RUGGEDCOM RSG920P V4.X (All versions < V4.3.8), RUGGEDCOM RSG920P V5.X (All versions < V5.7.0), RUGGEDCOM RSL910 (All versions < V5.7.0), RUGGEDCOM RST2228 (All versions < V5.7.0), RUGGEDCOM RST2228P (All versions < V5.7.0), RUGGEDCOM RST916C (All versions < V5.7.0), RUGGEDCOM RST916P (All versions < V5.7.0). The SSH server on affected devices is configured to offer weak ciphers by default.
The available sources name no fixed version. Check the vendor guidance in the references below.
Not sure whether and how you are affected? Ask a question about this vulnerability
Metrics
6.7
Priority
XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.
Source: NVD, CVSS v3
6.7
CVSS v3
Severity Medium on the scale from 0 to 10.
Source: Siemens ProductCERT, CVE.org
0.4 %
EPSS score
Low — model estimates < 1% exploitation likelihood.
Source: FIRST EPSS, percentile 30.3
Show all metrics
- Severity
- Medium
Priority score
The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?
Read in glossary- 41.36
Exploit maturity
An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.
Read in glossary- no public PoC known
XIEM Effective CVSS
XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command.
Read in glossary- 6.7
CVSS v3
CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.
Read in glossary- 6.7
EPSS score
The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“.
Read in glossary- 0.4 %
- Low — model estimates < 1% exploitation likelihood.
EPSS percentile
The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking.
Read in glossary- 30.3
- Elevated — this CVE ranks above at least 10% of all CVEs scored today.
KEV status
The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.
Read in glossary- —
- Published
CWE
CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect.
Read in glossary- CWE-326, CWE-311
Classification under NIS2 and CRA
Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.
NIS2
NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.
Read in glossary- Handle the vulnerability in regular vulnerability handling under Art. 21(2)(e) NIS2.
CRA
The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.
Read in glossary- From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
ISO/IEC 27001
ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.
Read in glossary- Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.
Description
A vulnerability has been identified in RUGGEDCOM i800 (All versions < V4.3.8), RUGGEDCOM i801 (All versions < V4.3.8), RUGGEDCOM i802 (All versions < V4.3.8), RUGGEDCOM i803 (All versions < V4.3.8), RUGGEDCOM M2100 (All versions < V4.3.8), RUGGEDCOM M2200 (All versions < V4.3.8), RUGGEDCOM M969 (All versions < V4.3.8), RUGGEDCOM RMC30 (All versions < V4.3.8), RUGGEDCOM RMC8388 V4.X (All versions < V4.3.8), RUGGEDCOM RMC8388 V5.X (All versions < V5.7.0), RUGGEDCOM RP110 (All versions < V4.3.8), RUGGEDCOM RS1600 (All versions < V4.3.8), RUGGEDCOM RS1600F (All versions < V4.3.8), RUGGEDCOM RS1600T (All versions < V4.3.8), RUGGEDCOM RS400 (All versions < V4.3.8), RUGGEDCOM RS401 (All versions < V4.3.8), RUGGEDCOM RS416 (All versions < V4.3.8), RUGGEDCOM RS416P (All versions < V4.3.8), RUGGEDCOM RS416Pv2 V4.X (All versions < V4.3.8), RUGGEDCOM RS416Pv2 V5.X (All versions < V5.7.0), RUGGEDCOM RS416v2 V4.X (All versions < V4.3.8), RUGGEDCOM RS416v2 V5.X (All versions < V5.7.0), RUGGEDCOM RS8000 (All versions < V4.3.8), RUGGEDCOM RS8000A (All versions < V4.3.8), RUGGEDCOM RS8000H (All versions < V4.3.8), RUGGEDCOM RS8000T (All versions < V4.3.8), RUGGEDCOM RS900 (All versions < V4.3.8), RUGGEDCOM RS900 (32M) V4.X (All versions < V4.3.8), RUGGEDCOM RS900 (32M) V5.X (All versions < V5.7.0), RUGGEDCOM RS900G (All versions < V4.3.8), RUGGEDCOM RS900G (32M) V4.X (All versions < V4.3.8), RUGGEDCOM RS900G (32M) V5.X (All versions < V5.7.0), RUGGEDCOM RS900GP (All versions < V4.3.8), RUGGEDCOM RS900L (All versions < V4.3.8), RUGGEDCOM RS900M-GETS-C01 (All versions < V4.3.8), RUGGEDCOM RS900M-GETS-XX (All versions < V4.3.8), RUGGEDCOM RS900M-STND-C01 (All versions < V4.3.8), RUGGEDCOM RS900M-STND-XX (All versions < V4.3.8), RUGGEDCOM RS900W (All versions < V4.3.8), RUGGEDCOM RS910 (All versions < V4.3.8), RUGGEDCOM RS910L (All versions < V4.3.8), RUGGEDCOM RS910W (All versions < V4.3.8), RUGGEDCOM RS920L (All versions < V4.3.8), RUGGEDCOM RS920W (All versions < V4.3.8), RUGGEDCOM RS930L (All versions < V4.3.8), RUGGEDCOM RS930W (All versions < V4.3.8), RUGGEDCOM RS940G (All versions < V4.3.8), RUGGEDCOM RS969 (All versions < V4.3.8), RUGGEDCOM RSG2100 (All versions < V4.3.8), RUGGEDCOM RSG2100 (32M) V4.X (All versions < V4.3.8), RUGGEDCOM RSG2100 (32M) V5.X (All versions < V5.7.0), RUGGEDCOM RSG2100P (All versions < V4.3.8), RUGGEDCOM RSG2100P (32M) V4.X (All versions < V4.3.8), RUGGEDCOM RSG2100P (32M) V5.X (All versions < V5.7.0), RUGGEDCOM RSG2200 (All versions < V4.3.8), RUGGEDCOM RSG2288 V4.X (All versions < V4.3.8), RUGGEDCOM RSG2288 V5.X (All versions < V5.7.0), RUGGEDCOM RSG2300 V4.X (All versions < V4.3.8), RUGGEDCOM RSG2300 V5.X (All versions < V5.7.0), RUGGEDCOM RSG2300P V4.X (All versions < V4.3.8), RUGGEDCOM RSG2300P V5.X (All versions < V5.7.0), RUGGEDCOM RSG2488 V4.X (All versions < V4.3.8), RUGGEDCOM RSG2488 V5.X (All versions < V5.7.0), RUGGEDCOM RSG907R (All versions < V5.7.0), RUGGEDCOM RSG908C (All versions < V5.7.0), RUGGEDCOM RSG909R (All versions < V5.7.0), RUGGEDCOM RSG910C (All versions < V5.7.0), RUGGEDCOM RSG920P V4.X (All versions < V4.3.8), RUGGEDCOM RSG920P V5.X (All versions < V5.7.0), RUGGEDCOM RSL910 (All versions < V5.7.0), RUGGEDCOM RST2228 (All versions < V5.7.0), RUGGEDCOM RST2228P (All versions < V5.7.0), RUGGEDCOM RST916C (All versions < V5.7.0), RUGGEDCOM RST916P (All versions < V5.7.0). The SSH server on affected devices is configured to offer weak ciphers by default. This could allow an unauthorized attacker in a man-in-the-middle position to read and modify any data passed over the connection between legitimate clients and the affected device.
Source: siemens_advisory, NVD (NIST), cvelistv5
Affected products
The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Siemens | RUGGEDCOM i800 |
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| Siemens | RUGGEDCOM i801 |
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| Siemens | RUGGEDCOM i802 |
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| Siemens | RUGGEDCOM i803 |
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| Siemens | RUGGEDCOM M2100 |
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| Siemens | RUGGEDCOM M2200 |
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| Siemens | RUGGEDCOM M969 |
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| Siemens | RUGGEDCOM RMC30 |
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| Siemens | RUGGEDCOM RMC8388 V4.X |
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| Siemens | RUGGEDCOM RMC8388 V5.X |
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| Siemens | RUGGEDCOM RP110 |
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| Siemens | RUGGEDCOM RS1600 |
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| Siemens | RUGGEDCOM RS1600F |
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| Siemens | RUGGEDCOM RS1600T |
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| Siemens | RUGGEDCOM RS400 |
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| Siemens | RUGGEDCOM RS401 |
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| Siemens | RUGGEDCOM RS416 |
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| Siemens | RUGGEDCOM RS416P |
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| Siemens | RUGGEDCOM RS416Pv2 V4.X |
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| Siemens | RUGGEDCOM RS416Pv2 V5.X |
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| Siemens | RUGGEDCOM RS416v2 V4.X |
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| Siemens | RUGGEDCOM RS416v2 V5.X |
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| Siemens | RUGGEDCOM RS8000 |
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| Siemens | RUGGEDCOM RS8000A |
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| Siemens | RUGGEDCOM RS8000H |
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| Siemens | RUGGEDCOM RS8000T |
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| Siemens | RUGGEDCOM RS900 |
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| Siemens | RUGGEDCOM RS900 (32M) V4.X |
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| Siemens | RUGGEDCOM RS900 (32M) V5.X |
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| Siemens | RUGGEDCOM RS900G |
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| Siemens | RUGGEDCOM RS900G (32M) V4.X |
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| Siemens | RUGGEDCOM RS900G (32M) V5.X |
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| Siemens | RUGGEDCOM RS900GP |
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| Siemens | RUGGEDCOM RS900L |
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| Siemens | RUGGEDCOM RS900M-GETS-C01 |
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| Siemens | RUGGEDCOM RS900M-GETS-XX |
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| Siemens | RUGGEDCOM RS900M-STND-C01 |
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| Siemens | RUGGEDCOM RS900M-STND-XX |
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| Siemens | RUGGEDCOM RS900W |
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| Siemens | RUGGEDCOM RS910 |
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| Siemens | RUGGEDCOM RS910L |
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| Siemens | RUGGEDCOM RS910W |
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| Siemens | RUGGEDCOM RS920L |
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| Siemens | RUGGEDCOM RS920W |
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| Siemens | RUGGEDCOM RS930L |
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| Siemens | RUGGEDCOM RS930W |
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| Siemens | RUGGEDCOM RS940G |
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| Siemens | RUGGEDCOM RS969 |
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Affected operating systems
| Family | Vendor | Product | Version |
|---|---|---|---|
| Other | siemens | ruggedcom_ros | — |
Weakness classes (CWE)
CWE-326Inadequate Encryption Strength
Class
The product stores or transmits sensitive data using an encryption scheme that is theoretically sound, but is not strong enough for the level of protection required.
Entry at MITRE CWE-326CWE-311Missing Encryption of Sensitive Data
Class
The product does not encrypt sensitive or critical information before storage or transmission.
Entry at MITRE CWE-311
References & sources
- Siemens ProductCERTproductcert/pdf/ssa-764417.pdfVendor advisory
- Siemens ProductCERTproductcert/html/ssa-764417.html