CVE-2023-36380

Name: CVE-2023-36380
Creator: NVD / NIST
Published: 2023-10-10T11:15:11.817+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.36%

Last modified Jun 17, 2026

CVE-2023-36380 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A vulnerability has been identified in CP-8031 MASTER MODULE (All versions < CPCI85 V05.11 (only with activated debug support)), CP-8050 MASTER MODULE (All versions < CPCI85 V05.11 (only with activated debug support)). The affected devices contain a hard-coded ID in the SSH `authorized_keys` configuration file. EPSS estimates a 0.36% chance of exploitation in the next 30 days.

Description

A vulnerability has been identified in CP-8031 MASTER MODULE (All versions < CPCI85 V05.11 (only with activated debug support)), CP-8050 MASTER MODULE (All versions < CPCI85 V05.11 (only with activated debug support)). The affected devices contain a hard-coded ID in the SSH `authorized_keys` configuration file. An attacker with knowledge of the corresponding private key could login to the device via SSH. Only devices with activated debug support are affected.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.36%

28.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-798

Affected Software

Vendor	Product	Versions
Siemens	Cp-8050 Firmware	< 05.11
Siemens	Cp-8031 Firmware	< 05.11

References

https://cert-portal.siemens.com/productcert/pdf/ssa-134651.pdfPatch, Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-134651.pdfPatch, Vendor Advisory

Timeline

Published: Oct 10, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-36380?

How severe is CVE-2023-36380?

CVE-2023-36380 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.36% probability of exploitation in the next 30 days.

How do I fix CVE-2023-36380?

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-2023-36380?

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

Scan your code now

Source: NVD / NIST