How severe is CVE-2023-33920?

CVE-2023-33920 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-2023-33920 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-33920?

CVE-2023-33920 affects Siemens Cpci85 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-33920?

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

When was CVE-2023-33920 published?

CVE-2023-33920 was published on 2023-06-13 and last updated on 2026-06-17.

CVE-2023-33920

CVE-2023-33920 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-798.

Key facts

Severity: Medium (CVSS 3.x base score 6.8)
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-798
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 the hash of the root password in a hard-coded form, which could be exploited for UART console login to the device. An attacker with direct physical access could exploit this vulnerability.

Frequently asked questions

What is CVE-2023-33920?: 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 the hash of the root password in a hard-coded form, which could be exploited for UART console login to the device. An attacker with direct physical access could exploit this vulnerability.
How severe is CVE-2023-33920?: CVE-2023-33920 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-2023-33920 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-33920?: CVE-2023-33920 affects Siemens Cpci85 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-33920?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-33920 published?: CVE-2023-33920 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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