What is CVE-2023-43503?

CVE-2023-43503 is a low-severity vulnerability in Siemens Comos, classified under Cleartext Transmission of Sensitive Information. CVSS score: 3.5/10. Published 2023-11-14.

How severe is CVE-2023-43503?

Low severity. CVSS v3 base score is 3.5 out of 10.

Vulnerability in Siemens Comos

CVE-2023-43503

A vulnerability has been identified in COMOS (All versions < V10.4.4). Caching system in the affected application leaks sensitive information such as user and project information in cleartext via UDP.

Published 2023-11-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (21.4th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Siemens Comos — versions All versions < V10.4.4

Weakness classification (CWE)

CWE-319 — Cleartext Transmission of Sensitive Information

References

cert-portal.siemens.com/productcert/pdf/ssa-137900.pdf (Vendor Advisory)

Frequently asked questions

What is CVE-2023-43503?: CVE-2023-43503 is a low-severity vulnerability in Siemens Comos, classified under Cleartext Transmission of Sensitive Information. CVSS score: 3.5/10. Published 2023-11-14.
How severe is CVE-2023-43503?: Low severity. CVSS v3 base score is 3.5 out of 10.