CVE-2021-33737

highPriorität · verfolgen · 31EPSS 0.011 · 64. PerzentilDEEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.06% (64th) EPSS

CVSS 7.8 · high

Is it mine?

41 products

Prüfe deine Angriffsfläche

Who says so?

4 sources

cnnvd · enisa_euvd · cisa_csaf_ot · siemens_psirt

EPSS · bewertet 2026-10-27

A vulnerability has been identified in SIMATIC CP 343-1 (incl. SIPLUS variants) (All versions), SIMATIC CP 343-1 Advanced (incl. SIPLUS variants) (All versions), SIMATIC CP 343-1 ERPC (All versions), SIMATIC CP 343-1 Lean (incl. SIPLUS variants) (All versions), SIMATIC CP 443-1 (All versions < V3.3), SIMATIC CP 443-1 (All versions < V3.3), SIMATIC CP 443-1 Advanced (All versions < V3.3), SIPLUS NET CP 443-1 (All versions < V3.3), SIPLUS NET CP 443-1 Advanced (All versions < V3.3). Sending a specially crafted packet to port 102/tcp of an affected device could cause a denial of service condition. A restart is needed to restore normal operations.

Behebungen

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

Ein Hersteller-Fix ist verfügbar.

BehobenSIMATIC CP 443-1 (6GK7443-1EX30-0XE0)siemens_psirt
Update to V3.3 or later version
https://support.industry.siemens.com/cs/ww/en/view/109817938/
BehobenSIMATIC CP 443-1 (6GK7443-1EX30-0XE1)siemens_psirt
Update to V3.3 or later version
https://support.industry.siemens.com/cs/ww/en/view/109817938/
BehobenSIMATIC CP 443-1 Advanced (6GK7443-1GX30-0XE0)siemens_psirt
Update to V3.3 or later version
https://support.industry.siemens.com/cs/ww/en/view/109817938/
BehobenSIPLUS NET CP 443-1 (6AG1443-1EX30-4XE0)siemens_psirt
Update to V3.3 or later version
https://support.industry.siemens.com/cs/ww/en/view/109817938/
BehobenSIPLUS NET CP 443-1 Advanced (6AG1443-1GX30-4XE0)siemens_psirt
Update to V3.3 or later version
https://support.industry.siemens.com/cs/ww/en/view/109817938/
BehobenSIMATIC CP 443-1 (6GK7443-1EX30-0XE0)cisa_csaf_ot
Update to V3.3 or later version
https://support.industry.siemens.com/cs/ww/en/view/109817938/
BehobenSIMATIC CP 443-1 (6GK7443-1EX30-0XE1)cisa_csaf_ot
Update to V3.3 or later version
https://support.industry.siemens.com/cs/ww/en/view/109817938/
BehobenSIMATIC CP 443-1 Advanced (6GK7443-1GX30-0XE0)cisa_csaf_ot
Update to V3.3 or later version
https://support.industry.siemens.com/cs/ww/en/view/109817938/
BehobenSIPLUS NET CP 443-1 (6AG1443-1EX30-4XE0)cisa_csaf_ot
Update to V3.3 or later version
https://support.industry.siemens.com/cs/ww/en/view/109817938/
BehobenSIPLUS NET CP 443-1 Advanced (6AG1443-1GX30-4XE0)cisa_csaf_ot
Update to V3.3 or later version
https://support.industry.siemens.com/cs/ww/en/view/109817938/
MitigationSIMATIC CP 343-1 (incl. SIPLUS variants)siemens_psirt
Limit access to port 102/tcp to trusted users and systems only
MitigationSIMATIC CP 343-1 Advanced (incl. SIPLUS variants)siemens_psirt
Limit access to port 102/tcp to trusted users and systems only
MitigationSIMATIC CP 343-1 ERPC (6GK7343-1FX00-0XE0)siemens_psirt
Limit access to port 102/tcp to trusted users and systems only
MitigationSIMATIC CP 343-1 Lean (incl. SIPLUS variants)siemens_psirt
Limit access to port 102/tcp to trusted users and systems only
MitigationSIMATIC CP 443-1 (6GK7443-1EX30-0XE0)siemens_psirt
Limit access to port 102/tcp to trusted users and systems only
MitigationSIMATIC CP 443-1 (6GK7443-1EX30-0XE1)siemens_psirt
Limit access to port 102/tcp to trusted users and systems only
MitigationSIMATIC CP 443-1 Advanced (6GK7443-1GX30-0XE0)siemens_psirt
Limit access to port 102/tcp to trusted users and systems only
MitigationSIPLUS NET CP 443-1 (6AG1443-1EX30-4XE0)siemens_psirt
Limit access to port 102/tcp to trusted users and systems only
MitigationSIPLUS NET CP 443-1 Advanced (6AG1443-1GX30-4XE0)siemens_psirt
Limit access to port 102/tcp to trusted users and systems only
MitigationSIMATIC CP 343-1 (incl. SIPLUS variants)cisa_csaf_ot
Limit access to port 102/tcp to trusted users and systems only
MitigationSIMATIC CP 343-1 Advanced (incl. SIPLUS variants)cisa_csaf_ot
Limit access to port 102/tcp to trusted users and systems only
MitigationSIMATIC CP 343-1 ERPC (6GK7343-1FX00-0XE0)cisa_csaf_ot
Limit access to port 102/tcp to trusted users and systems only
MitigationSIMATIC CP 343-1 Lean (incl. SIPLUS variants)cisa_csaf_ot
Limit access to port 102/tcp to trusted users and systems only
MitigationSIMATIC CP 443-1 (6GK7443-1EX30-0XE0)cisa_csaf_ot
Limit access to port 102/tcp to trusted users and systems only
MitigationSIMATIC CP 443-1 (6GK7443-1EX30-0XE1)cisa_csaf_ot
Limit access to port 102/tcp to trusted users and systems only
MitigationSIMATIC CP 443-1 Advanced (6GK7443-1GX30-0XE0)cisa_csaf_ot
Limit access to port 102/tcp to trusted users and systems only
MitigationSIPLUS NET CP 443-1 (6AG1443-1EX30-4XE0)cisa_csaf_ot
Limit access to port 102/tcp to trusted users and systems only
MitigationSIPLUS NET CP 443-1 Advanced (6AG1443-1GX30-4XE0)cisa_csaf_ot
Limit access to port 102/tcp to trusted users and systems only
Kein Fix geplantSIMATIC CP 343-1 (incl. SIPLUS variants)siemens_psirt
Currently no fix is planned
Kein Fix geplantSIMATIC CP 343-1 Advanced (incl. SIPLUS variants)siemens_psirt
Currently no fix is planned
Kein Fix geplantSIMATIC CP 343-1 ERPC (6GK7343-1FX00-0XE0)siemens_psirt
Currently no fix is planned
Kein Fix geplantSIMATIC CP 343-1 Lean (incl. SIPLUS variants)siemens_psirt
Currently no fix is planned
Kein Fix geplantSIMATIC CP 343-1 (incl. SIPLUS variants)cisa_csaf_ot
Currently no fix is planned
Kein Fix geplantSIMATIC CP 343-1 Advanced (incl. SIPLUS variants)cisa_csaf_ot
Currently no fix is planned
Kein Fix geplantSIMATIC CP 343-1 ERPC (6GK7343-1FX00-0XE0)cisa_csaf_ot
Currently no fix is planned
Kein Fix geplantSIMATIC CP 343-1 Lean (incl. SIPLUS variants)cisa_csaf_ot
Currently no fix is planned

cvss

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

7.8

010

Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen⚠ Quellen uneinig · medium–high · 6.6–7.8

v2.07.8highAV:N/AC:L/Au:N/C:N/I:N/A:Cprimary · NVD / NIST USAusnutzbarkeit 10 · Auswirkung 6.9

v2.06.6mediumAV:N/AC:L/Au:N/C:N/I:N/A:C/E:Usecondary · CVSS-BT (t0sche)

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:U/RC:Csecondary · CISA US

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · productcert@siemens.com DEAusnutzbarkeit 3.9 · Auswirkung 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:U/RC:Csecondary · Siemens ProductCERT DE

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:U/RC:Csecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · NVD / NIST USAusnutzbarkeit 3.9 · Auswirkung 3.6

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

CWE-119USCWE-119USCWE-119US

betroffene Produkte (41)

Betroffene Produkte und Versionsbereiche.

SIMATIC CP 343-1 (incl. SIPLUS variants)alle Versionencisa_csaf_otUS
SIMATIC CP 343-1 Advanced (incl. SIPLUS variants)alle Versionencisa_csaf_otUS
SIMATIC CP 343-1 ERPC (6GK7343-1FX00-0XE0)alle Versionencisa_csaf_otUS
SIMATIC CP 343-1 Lean (incl. SIPLUS variants)alle Versionencisa_csaf_otUS
SIMATIC CP 443-1 (6GK7443-1EX30-0XE0)alle Versionencisa_csaf_otUS
SIMATIC CP 443-1 (6GK7443-1EX30-0XE1)alle Versionencisa_csaf_otUS
SIMATIC CP 443-1 Advanced (6GK7443-1GX30-0XE0)alle Versionencisa_csaf_otUS
SIPLUS NET CP 443-1 (6AG1443-1EX30-4XE0)alle Versionencisa_csaf_otUS
SIPLUS NET CP 443-1 Advanced (6AG1443-1GX30-4XE0)alle Versionencisa_csaf_otUS
Siemens SIMATIC CP 343-1 (incl. SIPLUS variants)≤ vers:all/*cisa_csaf_otUS
Siemens SIMATIC CP 343-1 Advanced (incl. SIPLUS variants)≤ vers:all/*cisa_csaf_otUS
Siemens SIMATIC CP 343-1 ERPC (6GK7343-1FX00-0XE0)≤ vers:all/*cisa_csaf_otUS
Siemens SIMATIC CP 343-1 Lean (incl. SIPLUS variants)≤ vers:all/*cisa_csaf_otUS
Siemens SIMATIC CP 443-1 (6GK7443-1EX30-0XE0)< V3.3cisa_csaf_otUS
Siemens SIMATIC CP 443-1 (6GK7443-1EX30-0XE1)< V3.3cisa_csaf_otUS
Siemens SIMATIC CP 443-1 Advanced (6GK7443-1GX30-0XE0)< V3.3cisa_csaf_otUS
Siemens SIPLUS NET CP 443-1 (6AG1443-1EX30-4XE0)< V3.3cisa_csaf_otUS
Siemens SIPLUS NET CP 443-1 Advanced (6AG1443-1GX30-4XE0)< V3.3cisa_csaf_otUS
Siemens SIMATIC CP 343-1 (incl. SIPLUS variants)≤ All versionsenisa_euvdEU
Siemens SIMATIC CP 343-1 Advanced (incl. SIPLUS variants)≤ All versionsenisa_euvdEU

20 von 41 angezeigt

Advisories (2)

Hersteller- und Ökosystem-Meldungen dazu.

SSA-549234SSA-549234: Denial-of-Service Vulnerability in SIMATIC NET CP Modules2021-09-14csaf · siemens_psirtDE
A denial of service vulnerability was identified in different types of Communication Processors. An attacker could exploit this vulnerability causing the device to become un-operational until the device is restarted. Siemens has released updates for several affected products and recommends to update to the latest versions. Siemens recommends specific countermeasures for products where updates are not, or not yet available.
ICSA-21-257-15Siemens SIMATIC NET CP Modules2021-09-14icsa · cisa_csaf_otUS
A denial of service vulnerability was identified in different types of Communication Processors. An attacker could exploit this vulnerability causing the device to become un-operational until the device is restarted. Siemens has released updates for several affected products and recommends to update to the latest versions. Siemens recommends specific countermeasures for products where updates are not, or not yet available.

auch bekannt als (3)

Weitere Namen und Kennungen dieser Entität.

quellen

Welche Quellen diesen Datensatz belegen und wann.

cnnvd enisa_euvd cisa_csaf_ot siemens_psirt NVD CVE.org MITRE

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

Referenzen (7)

Externe Belege — Patches, Meldungen, Analysen.

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