How severe is CVE-2023-43503?

CVE-2023-43503 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2023-43503 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-43503?

CVE-2023-43503 affects Siemens Comos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-43503?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-43503 published?

CVE-2023-43503 was published on 2023-11-14 and last updated on 2026-06-17.

CVE-2023-43503

CVE-2023-43503 is a low-severity vulnerability in Siemens Comos with a CVSS 3.x base score of 3.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-319.

Key facts

Severity: Low (CVSS 3.x base score 3.5)
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-319
Affected product: Siemens Comos
Published: 2023-11-14
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2023-43503?: CVE-2023-43503 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2023-43503 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-43503?: CVE-2023-43503 affects Siemens Comos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-43503?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-43503 published?: CVE-2023-43503 was published on 2023-11-14 and last updated on 2026-06-17.

References

https://cert-portal.siemens.com/productcert/pdf/ssa-137900.pdf

Affected products (1)

cpe:2.3:a:siemens:comos:*:*:*:*:*:*:*:*

More vulnerabilities in Siemens Comos

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