CVE-2021-45033

highpriority · track · 35OT risk · elevatedEPSS 0.009 · 60 %ileDEEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.91% (60th) EPSS

CVSS 8.5 · high

Is it mine?

24 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-24

A vulnerability has been identified in CP-8000 MASTER MODULE WITH I/O -25/+70°C (All versions < V16.20), CP-8000 MASTER MODULE WITH I/O -40/+70°C (All versions < V16.20), CP-8021 MASTER MODULE (All versions < V16.20), CP-8022 MASTER MODULE WITH GPRS (All versions < V16.20). An undocumented debug port uses hard-coded default credentials. If this port is enabled by a privileged user, an attacker aware of the credentials could access an administrative debug shell on the affected device.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedCP-8000 MASTER MODULE WITH I/O -25/+70°Csiemens_psirt
Update to V16.20 or later version
https://support.industry.siemens.com/cs/ww/en/view/109805670
FixedCP-8000 MASTER MODULE WITH I/O -40/+70°Csiemens_psirt
Update to V16.20 or later version
https://support.industry.siemens.com/cs/ww/en/view/109805670
FixedCP-8021 MASTER MODULEsiemens_psirt
Update to V16.20 or later version
https://support.industry.siemens.com/cs/ww/en/view/109805670
FixedCP-8022 MASTER MODULE WITH GPRSsiemens_psirt
Update to V16.20 or later version
https://support.industry.siemens.com/cs/ww/en/view/109805670
FixedCP-8000 MASTER MODULE WITH I/O -25/+70°Ccisa_csaf_ot
Update to V16.20 or later version
https://support.industry.siemens.com/cs/ww/en/view/109805670
FixedCP-8000 MASTER MODULE WITH I/O -40/+70°Ccisa_csaf_ot
Update to V16.20 or later version
https://support.industry.siemens.com/cs/ww/en/view/109805670
FixedCP-8021 MASTER MODULEcisa_csaf_ot
Update to V16.20 or later version
https://support.industry.siemens.com/cs/ww/en/view/109805670
FixedCP-8022 MASTER MODULE WITH GPRScisa_csaf_ot
Update to V16.20 or later version
https://support.industry.siemens.com/cs/ww/en/view/109805670

cvss

Technical severity, 0–10. One row per scoring source.

9.9

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 8.1–9.9

v2.08.5highAV:N/AC:M/Au:S/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 6.8 · impact 10

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 5.9

v3.19.9criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:Csecondary · CISA US

v3.19.9criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-798USprimaryCWE-798USCWE-798US

affected products (24)

Products and version ranges known to be affected.

CP-8000 MASTER MODULE WITH I/O -25/+70°C (6MF2101-0AB10-0AA0)all versionscisa_csaf_otUS
CP-8000 MASTER MODULE WITH I/O -40/+70°C (6MF2101-1AB10-0AA0)all versionscisa_csaf_otUS
CP-8021 MASTER MODULE (6MF2802-1AA00)all versionscisa_csaf_otUS
CP-8022 MASTER MODULE WITH GPRS (6MF2802-2AA00)all versionscisa_csaf_otUS
Siemens CP-8000 MASTER MODULE WITH I/O -25/+70°C< V16.20cisa_csaf_otUS
Siemens CP-8000 MASTER MODULE WITH I/O -40/+70°C< V16.20cisa_csaf_otUS
Siemens CP-8021 MASTER MODULE< V16.20cisa_csaf_otUS
Siemens CP-8022 MASTER MODULE WITH GPRS< V16.20cisa_csaf_otUS
Siemens CP-8000 MASTER MODULE WITH I/O -25/+70°CAll versions → V16.20enisa_euvdEU
Siemens CP-8000 MASTER MODULE WITH I/O -40/+70°CAll versions → V16.20enisa_euvdEU
Siemens CP-8021 MASTER MODULEAll versions → V16.20enisa_euvdEU
Siemens CP-8022 MASTER MODULE WITH GPRSAll versions → V16.20enisa_euvdEU
siemens cp-8000 master module with i/o -25/+70 firmware< 16.20nvdUScpe:2.3:o:siemens:cp-8000_master_module_with_i\/o_-25\/\+70_firmware:*:*:*:*:*:*:*:*
siemens cp-8000 master module with i/o -40/+70 firmware< 16.20nvdUScpe:2.3:o:siemens:cp-8000_master_module_with_i\/o_-40\/\+70_firmware:*:*:*:*:*:*:*:*
siemens cp-8021 master module firmware< 16.20nvdUScpe:2.3:o:siemens:cp-8021_master_module_firmware:*:*:*:*:*:*:*:*
siemens cp-8022 master module with gprs firmware< 16.20nvdUScpe:2.3:o:siemens:cp-8022_master_module_with_gprs_firmware:*:*:*:*:*:*:*:*
Siemens CP-8000 MASTER MODULE WITH I/O -25/+70°C< V16.20siemens_psirtDE
Siemens CP-8000 MASTER MODULE WITH I/O -25/+70°C (6MF2101-0AB10-0AA0)< V16.20siemens_psirtDE
Siemens CP-8000 MASTER MODULE WITH I/O -40/+70°C< V16.20siemens_psirtDE
Siemens CP-8000 MASTER MODULE WITH I/O -40/+70°C (6MF2101-1AB10-0AA0)< V16.20siemens_psirtDE

showing 20 of 24

advisories (2)

Vendor and ecosystem advisories describing this.

SSA-324998SSA-324998: Multiple Vulnerabilities in SICAM A80002022-01-11csaf · siemens_psirtDE
SICAM A8000 devices are impacted by two vulnerabilities. The first one could allow a privileged user to enable a debug port with default credentials. The second vulnerability could allow unauthenticated access to certain previously created log files. Siemens has released updates for the affected products and recommends to update to the latest versions.
ICSA-22-013-02Siemens SICAM A80002022-01-11icsa · cisa_csaf_otUS
SICAM A8000 devices are impacted by two vulnerabilities. The first one could allow a privileged user to enable a debug port with default credentials. The second vulnerability could allow unauthenticated access to certain previously created log files. Siemens has released updates for the affected products and recommends to update to the latest versions.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisa_csaf_ot nvd siemens_psirt NVD CVE.org MITRE

published 2022-01-11modified 2026-06-17

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+2274 more

references (6)

External citations — patches, advisories, analysis.

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