How severe is CVE-2023-33921?

CVE-2023-33921 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-33921 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-33921?

CVE-2023-33921 affects Siemens Cpci85 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-33921?

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

When was CVE-2023-33921 published?

CVE-2023-33921 was published on 2023-06-13 and last updated on 2026-06-17.

CVE-2023-33921

CVE-2023-33921 is a medium-severity vulnerability in Siemens Cpci85 Firmware with a CVSS 3.x base score of 6.8. 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-749.

Key facts

Severity: Medium (CVSS 3.x base score 6.8)
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-749
Affected product: Siemens Cpci85 Firmware
Published: 2023-06-13
Last modified: 2026-06-17

Description

A vulnerability has been identified in CP-8031 MASTER MODULE (All versions < CPCI85 V05), CP-8050 MASTER MODULE (All versions < CPCI85 V05). The affected devices contain an exposed UART console login interface. An attacker with direct physical access could try to bruteforce or crack the root password to login to the device.

Frequently asked questions

What is CVE-2023-33921?: A vulnerability has been identified in CP-8031 MASTER MODULE (All versions < CPCI85 V05), CP-8050 MASTER MODULE (All versions < CPCI85 V05). The affected devices contain an exposed UART console login interface. An attacker with direct physical access could try to bruteforce or crack the root password to login to the device.
How severe is CVE-2023-33921?: CVE-2023-33921 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-33921 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-33921?: CVE-2023-33921 affects Siemens Cpci85 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-33921?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-33921 published?: CVE-2023-33921 was published on 2023-06-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:siemens:cpci85_firmware:*:*:*:*:*:*:*:*

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