How severe is CVE-2023-36380?

CVE-2023-36380 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-36380 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-2023-36380?

CVE-2023-36380 primarily affects Siemens Cp-8050 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-36380?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2023-36380 published?

CVE-2023-36380 was published on 2023-10-10 and last updated on 2026-06-17.

CVE-2023-36380

CVE-2023-36380 is a critical-severity vulnerability in Siemens Cp-8050 Firmware with a CVSS 3.x base score of 9.8. 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: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-798
Affected product: Siemens Cp-8050 Firmware
Published: 2023-10-10
Last modified: 2026-06-17

Description

A vulnerability has been identified in CP-8031 MASTER MODULE (All versions < CPCI85 V05.11 (only with activated debug support)), CP-8050 MASTER MODULE (All versions < CPCI85 V05.11 (only with activated debug support)). The affected devices contain a hard-coded ID in the SSH `authorized_keys` configuration file. An attacker with knowledge of the corresponding private key could login to the device via SSH. Only devices with activated debug support are affected.

Frequently asked questions

What is CVE-2023-36380?: A vulnerability has been identified in CP-8031 MASTER MODULE (All versions < CPCI85 V05.11 (only with activated debug support)), CP-8050 MASTER MODULE (All versions < CPCI85 V05.11 (only with activated debug support)). The affected devices contain a hard-coded ID in the SSH `authorized_keys` configuration file. An attacker with knowledge of the corresponding private key could login to the device via SSH. Only devices with activated debug support are affected.
How severe is CVE-2023-36380?: CVE-2023-36380 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-36380 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-2023-36380?: CVE-2023-36380 primarily affects Siemens Cp-8050 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-36380?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-36380 published?: CVE-2023-36380 was published on 2023-10-10 and last updated on 2026-06-17.

References

https://cert-portal.siemens.com/productcert/pdf/ssa-134651.pdf

Affected products (2)

cpe:2.3:o:siemens:cp-8050_firmware:*:*:*:*:cpci85:*:*:*
cpe:2.3:o:siemens:cp-8031_firmware:*:*:*:*:cpci85:*:*:*

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