CVE-2023-42796

Name: CVE-2023-42796
Creator: NVD / NIST
Published: 2023-10-10T11:15:12.15+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.73%

Last modified Jun 17, 2026

CVE-2023-42796 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A vulnerability has been identified in CP-8031 MASTER MODULE (All versions < CPCI85 V05.11), CP-8050 MASTER MODULE (All versions < CPCI85 V05.11). The web server of affected devices fails to properly sanitize user input for the /sicweb-ajax/tmproot/ endpoint. This could allow an authenticated remote attacker to traverse directories on the system and download arbitrary files. EPSS estimates a 0.73% chance of exploitation in the next 30 days.

Description

A vulnerability has been identified in CP-8031 MASTER MODULE (All versions < CPCI85 V05.11), CP-8050 MASTER MODULE (All versions < CPCI85 V05.11). The web server of affected devices fails to properly sanitize user input for the /sicweb-ajax/tmproot/ endpoint. This could allow an authenticated remote attacker to traverse directories on the system and download arbitrary files. By exploring active session IDs, the vulnerability could potentially be leveraged to escalate privileges to the administrator role.

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

0.73%

49.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

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-770890.pdfPatch, Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-770890.pdfPatch, Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2023-42796?

How severe is CVE-2023-42796?

CVE-2023-42796 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.73% probability of exploitation in the next 30 days.

How do I fix CVE-2023-42796?

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-2023-42796?

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

Scan your code now

Source: NVD / NIST