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Fencer Vulns
high 8.8

CVE-2021-45033 json

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…

published 2022-01-11 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-31830

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 61%
public exploits
0
none known

Summary

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.

Patch / fix

  • 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

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-22-013-02 updated cvss 9.9

Siemens SICAM A8000

  • Siemens CP-8000 MASTER MODULE WITH I/O -25/+70°C <V16.20 Siemens CP-8000 MASTER MODULE WITH I/O -40/+70°C <V16.20 Siemens CP-8021 MASTER MODULE <V16.20 Siemens CP-8022 MASTER MODULE WITH GPRS <V16.20
    affected: fixed in V16.20 support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

0.94% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 8.5 AV:N/AC:M/Au:S/C:C/I:C/A:C

Affected products

  • Siemens CP-8000 MASTER MODULE WITH I/O -25/+70°C
  • Siemens CP-8000 MASTER MODULE WITH I/O -40/+70°C
  • Siemens CP-8021 MASTER MODULE
  • Siemens CP-8022 MASTER MODULE WITH GPRS

Classification

Weakness
  • CWE-798 Use of Hard-coded Credentials

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.