CVE-2021-45033

Name: CVE-2021-45033
Creator: NVD / NIST
Published: 2022-01-11T12:15:10.093+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.91%

Last modified Jun 17, 2026

CVE-2021-45033 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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. EPSS estimates a 0.91% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

0.91%

55.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Siemens	Cp-8000 Master Module With I\/O -25\/\+70 Firmware	< 16.20
Siemens	Cp-8000 Master Module With I\/O -40\/\+70 Firmware	< 16.20
Siemens	Cp-8021 Master Module Firmware	< 16.20
Siemens	Cp-8022 Master Module With Gprs Firmware	< 16.20

References

https://cert-portal.siemens.com/productcert/pdf/ssa-324998.pdfPatch, Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-324998.pdfPatch, Vendor Advisory

Timeline

Published: Jan 11, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-45033?

How severe is CVE-2021-45033?

CVE-2021-45033 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.91% probability of exploitation in the next 30 days.

How do I fix CVE-2021-45033?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-45033?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST