How severe is CVE-2020-28395?

CVE-2020-28395 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-28395 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-28395?

CVE-2020-28395 primarily affects Siemens Scalance Xr324-12m Firmware. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-28395?

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

When was CVE-2020-28395 published?

CVE-2020-28395 was published on 2021-01-12 and last updated on 2026-06-17.

CVE-2020-28395

CVE-2020-28395 is a medium-severity vulnerability in Siemens Scalance Xr324-12m Firmware with a CVSS 3.x base score of 5.9. 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 5.9)
CVSS v2: 4.3
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-321
Affected product: Siemens Scalance Xr324-12m Firmware
Published: 2021-01-12
Last modified: 2026-06-17

Description

A vulnerability has been identified in SCALANCE X-200RNA switch family (All versions < V3.2.7), SCALANCE X-300 switch family (incl. X408 and SIPLUS NET variants) (All versions < V4.1.0). Devices do not create a new unique private key after factory reset. An attacker could leverage this situation to a man-in-the-middle situation and decrypt previously captured traffic.

Frequently asked questions

What is CVE-2020-28395?: A vulnerability has been identified in SCALANCE X-200RNA switch family (All versions < V3.2.7), SCALANCE X-300 switch family (incl. X408 and SIPLUS NET variants) (All versions < V4.1.0). Devices do not create a new unique private key after factory reset. An attacker could leverage this situation to a man-in-the-middle situation and decrypt previously captured traffic.
How severe is CVE-2020-28395?: CVE-2020-28395 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2020-28395 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-28395?: CVE-2020-28395 primarily affects Siemens Scalance Xr324-12m Firmware. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-28395?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-28395 published?: CVE-2020-28395 was published on 2021-01-12 and last updated on 2026-06-17.

References

Affected products (8)

cpe:2.3:o:siemens:scalance_xr324-12m_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_xr324-12m_ts_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_xr324-4m_eec_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_xr324-4m_poe_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_xr324-4m_poe_ts_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_xr324wg_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_xr326-2c_poe_wg_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_xr328-4c_wg_firmware:*:*:*:*:*:*:*:*

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