Is CVE-2021-37186 in the CISA KEV catalog?

No. CVE-2021-37186 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-37186?

CVE-2021-37186 has a CVSS v3 base score of 5.4 (MEDIUM).

What is the EPSS score for CVE-2021-37186?

CVE-2021-37186 has an EPSS score of 0.34% (26th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-37186?

Upgrade logo\! cmr2020 firmware to 2.2 or later. Fixes are available for 6 affected products.

CVE & CISA-KEV Catalog

CVE-2021-37186

MEDIUM

5.4

CVSS v3

NVD

Description

A vulnerability has been identified in LOGO! CMR2020 (All versions < V2.2), LOGO! CMR2040 (All versions < V2.2), SIMATIC RTU3010C (All versions < V4.0.9), SIMATIC RTU3030C (All versions < V4.0.9), SIMATIC RTU3031C (All versions < V4.0.9), SIMATIC RTU3041C (All versions < V4.0.9). The underlying TCP/IP stack does not properly calculate the random numbers used as ISN (Initial Sequence Numbers). An adjacent attacker with network access to the LAN interface could interfere with traffic, spoof the connection and gain access to sensitive information.

CWE-330

How to fix

Remediation Available

logo\! cmr2020 firmwareNVD

Affected:< 2.2Fixed in:2.2CVE-2021-37186derived from NVD

logo\! cmr2040 firmwareNVD

Affected:< 2.2Fixed in:2.2CVE-2021-37186derived from NVD

simatic rtu3010c firmwareNVD

Affected:< 4.0.9Fixed in:4.0.9CVE-2021-37186derived from NVD

simatic rtu3030c firmwareNVD

Affected:< 4.0.9Fixed in:4.0.9CVE-2021-37186derived from NVD

simatic rtu3031c firmwareNVD

Affected:< 4.0.9Fixed in:4.0.9CVE-2021-37186derived from NVD

simatic rtu3041c firmwareNVD

Affected:< 4.0.9Fixed in:4.0.9CVE-2021-37186derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorAdjacent

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Exploit Intelligence

0.34%probability of exploitation in 30 days

26thpercentile

Low risk: more likely to be exploited than 26% of all known CVEs.

References

Patch1

cert-portal.siemens.com

Related Vulnerabilities

Other CWE-330 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-5420	Critical	9.8	92%	-	Fix
CVE-2021-34646	Critical	9.8	51%	-	-
CVE-2017-6026	Critical	9.1	32%	-	-
CVE-2008-0087	High	7.5	31%	-	-
CVE-2018-17888	Critical	9.8	30%	-	-
CVE-2020-11901	Critical	9.0	21%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.