CVE-2021-37186

mediumPriorität · verfolgen · 22OT-Risiko · erhöhtEPSS 0.004 · 29. PerzentilDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.36% (29th) EPSS

CVSS 4.8 · medium

Is it mine?

36 products

Prüfe deine Angriffsfläche

Who says so?

5 sources

cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · bewertet 2026-10-27

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.

Behebungen

Hersteller-Fix, Mitigation oder Workaround, wie von den Quellen veröffentlicht.

Ein Hersteller-Fix ist verfügbar.

BehobenLOGO! CMR2020siemens_psirt
Update to V2.2 or later version
https://support.industry.siemens.com/cs/ww/en/view/109800267/
BehobenLOGO! CMR2040siemens_psirt
Update to V2.2 or later version
https://support.industry.siemens.com/cs/ww/en/view/109800267/
BehobenSIMATIC RTU3010Csiemens_psirt
Update to V4.0.9 or later version
https://support.industry.siemens.com/cs/ww/en/view/109802779/
BehobenSIMATIC RTU3030Csiemens_psirt
Update to V4.0.9 or later version
https://support.industry.siemens.com/cs/ww/en/view/109802779/
BehobenSIMATIC RTU3031Csiemens_psirt
Update to V4.0.9 or later version
https://support.industry.siemens.com/cs/ww/en/view/109802779/
BehobenSIMATIC RTU3041Csiemens_psirt
Update to V4.0.9 or later version
https://support.industry.siemens.com/cs/ww/en/view/109802779/
BehobenLOGO! CMR2020cisa_csaf_ot
Update to V2.2 or later version
https://support.industry.siemens.com/cs/ww/en/view/109800267/
BehobenLOGO! CMR2040cisa_csaf_ot
Update to V2.2 or later version
https://support.industry.siemens.com/cs/ww/en/view/109800267/
BehobenSIMATIC RTU3010Ccisa_csaf_ot
Update to V4.0.9 or later version
https://support.industry.siemens.com/cs/ww/en/view/109802779/
BehobenSIMATIC RTU3030Ccisa_csaf_ot
Update to V4.0.9 or later version
https://support.industry.siemens.com/cs/ww/en/view/109802779/
BehobenSIMATIC RTU3031Ccisa_csaf_ot
Update to V4.0.9 or later version
https://support.industry.siemens.com/cs/ww/en/view/109802779/
BehobenSIMATIC RTU3041Ccisa_csaf_ot
Update to V4.0.9 or later version
https://support.industry.siemens.com/cs/ww/en/view/109802779/

cvss

Technischer Schweregrad, 0–10. Eine Zeile je Quelle.

5.4

010

Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen

v2.04.8mediumAV:A/AC:L/Au:N/C:P/I:P/A:Nprimary · NVD / NIST USAusnutzbarkeit 6.5 · Auswirkung 4.9

v3.15.4mediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Nprimary · NVD / NIST USAusnutzbarkeit 2.8 · Auswirkung 2.5

v3.15.4mediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:Csecondary · CISA US

v3.15.4mediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:Csecondary · Siemens ProductCERT DE

v3.15mediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

CWE-330USprimärCWE-330USCWE-330US

betroffene Produkte (36)

Betroffene Produkte und Versionsbereiche.

LOGO! CMR2020 (6GK7142-7BX00-0AX0)alle Versionencisa_csaf_otUS
LOGO! CMR2040 (6GK7142-7EX00-0AX0)alle Versionencisa_csaf_otUS
SIMATIC RTU3010C (6NH3112-0BA00-0XX0)alle Versionencisa_csaf_otUS
SIMATIC RTU3030C (6NH3112-3BA00-0XX0)alle Versionencisa_csaf_otUS
SIMATIC RTU3031C (6NH3112-3BB00-0XX0)alle Versionencisa_csaf_otUS
SIMATIC RTU3041C (6NH3112-4BB00-0XX0)alle Versionencisa_csaf_otUS
Siemens LOGO! CMR2020< V2.2cisa_csaf_otUS
Siemens LOGO! CMR2040< V2.2cisa_csaf_otUS
Siemens SIMATIC RTU3010C< V4.0.9cisa_csaf_otUS
Siemens SIMATIC RTU3030C< V4.0.9cisa_csaf_otUS
Siemens SIMATIC RTU3031C< V4.0.9cisa_csaf_otUS
Siemens SIMATIC RTU3041C< V4.0.9cisa_csaf_otUS
Siemens LOGO! CMR2020All versions → V2.2enisa_euvdEU
Siemens LOGO! CMR2040All versions → V2.2enisa_euvdEU
Siemens SIMATIC RTU3010CAll versions → V4.0.9enisa_euvdEU
Siemens SIMATIC RTU3030CAll versions → V4.0.9enisa_euvdEU
Siemens SIMATIC RTU3031CAll versions → V4.0.9enisa_euvdEU
Siemens SIMATIC RTU3041CAll versions → V4.0.9enisa_euvdEU
siemens logo! cmr2020 firmware< 2.2nvdUScpe:2.3:o:siemens:logo\!_cmr2020_firmware:*:*:*:*:*:*:*:*
siemens logo! cmr2040 firmware< 2.2nvdUScpe:2.3:o:siemens:logo\!_cmr2040_firmware:*:*:*:*:*:*:*:*

20 von 36 angezeigt

Advisories (2)

Hersteller- und Ökosystem-Meldungen dazu.

SSA-316383SSA-316383: NumberJack Vulnerability in LOGO! CMR and SIMATIC RTU 3000 devices2021-09-14csaf · siemens_psirtDE
A vulnerability has been identified in the underlying TCP/IP stack of LOGO! CMR and SIMATIC RTU 3000 devices. It could allow an attacker with network access to the LAN interface of an affected device to hijack an ongoing connection or spoof a new one. The WAN interface, however, is not affected. Siemens has released updates for the affected products and recommends to update to the latest versions.
ICSA-21-257-13Siemens LOGO! CMR and SIMATIC RTU 3000 (Update A)2021-09-14icsa · cisa_csaf_otUS
A vulnerability has been identified in the underlying TCP/IP stack of LOGO! CMR and SIMATIC RTU 3000 devices. It could allow an attacker with network access to the LAN interface of an affected device to hijack an ongoing connection or spoof a new one. The WAN interface, however, is not affected. Siemens has released updates for the affected products and recommends to update to the latest versions.

auch bekannt als (3)

Weitere Namen und Kennungen dieser Entität.

quellen

Welche Quellen diesen Datensatz belegen und wann.

cnnvd enisa_euvd cisa_csaf_ot nvd siemens_psirt NVD CVE.org MITRE

veröffentlicht 2021-09-14geändert 2026-06-17

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+568 weitere

Referenzen (8)

Externe Belege — Patches, Meldungen, Analysen.

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