How severe is CVE-2020-25233?

CVE-2020-25233 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-25233 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-25233?

CVE-2020-25233 affects Siemens Logo! 8 Bm Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-25233?

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

When was CVE-2020-25233 published?

CVE-2020-25233 was published on 2020-12-14 and last updated on 2026-06-17.

CVE-2020-25233

CVE-2020-25233 is a medium-severity vulnerability in Siemens Logo! 8 Bm Firmware with a CVSS 3.x base score of 5.5. 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-321.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 2.1
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-321
Affected product: Siemens Logo! 8 Bm Firmware
Published: 2020-12-14
Last modified: 2026-06-17

Description

A vulnerability has been identified in LOGO! 8 BM (incl. SIPLUS variants) (All versions < V8.3). The firmware update of affected devices contains the private RSA key that is used as a basis for encryption of communication with the device.

Frequently asked questions

What is CVE-2020-25233?: A vulnerability has been identified in LOGO! 8 BM (incl. SIPLUS variants) (All versions < V8.3). The firmware update of affected devices contains the private RSA key that is used as a basis for encryption of communication with the device.
How severe is CVE-2020-25233?: CVE-2020-25233 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2020-25233 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-25233?: CVE-2020-25233 affects Siemens Logo! 8 Bm Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-25233?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-25233 published?: CVE-2020-25233 was published on 2020-12-14 and last updated on 2026-06-17.

References

https://cert-portal.siemens.com/productcert/pdf/ssa-480824.pdf

Affected products (1)

cpe:2.3:o:siemens:logo\!_8_bm_firmware:*:*:*:*:*:*:*:*

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