How severe is CVE-2025-40594?

CVE-2025-40594 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over local access with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability low.

Is CVE-2025-40594 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-40594?

CVE-2025-40594 primarily affects Siemens Sinamics G220 Firmware. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-40594?

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

Does CVE-2025-40594 have an EU (EUVD) identifier?

Yes. CVE-2025-40594 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-27242.

When was CVE-2025-40594 published?

CVE-2025-40594 was published on 2025-09-09 and last updated on 2026-06-17.

CVE-2025-40594

CVE-2025-40594 is a medium-severity vulnerability in Siemens Sinamics G220 Firmware with a CVSS 3.x base score of 6.3. 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-269.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
CVSS v4: 6.9
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-27242
Weakness: CWE-269
Affected product: Siemens Sinamics G220 Firmware
Published: 2025-09-09
Last modified: 2026-06-17

Description

A vulnerability has been identified in SINAMICS G220 V6.4 (All versions < V6.4 HF2), SINAMICS S200 V6.4 (All versions < V6.4 HF7), SINAMICS S210 V6.4 (All versions < V6.4 HF2). The affected devices allow a factory reset to be executed without the required privileges due to improper privilege management as well as manipulation of configuration data because of leaked privileges of previous sessions. This could allow an unauthorized attacker to escalate their privileges.

Frequently asked questions

What is CVE-2025-40594?: A vulnerability has been identified in SINAMICS G220 V6.4 (All versions < V6.4 HF2), SINAMICS S200 V6.4 (All versions < V6.4 HF7), SINAMICS S210 V6.4 (All versions < V6.4 HF2). The affected devices allow a factory reset to be executed without the required privileges due to improper privilege management as well as manipulation of configuration data because of leaked privileges of previous sessions. This could allow an unauthorized attacker to escalate their privileges.
How severe is CVE-2025-40594?: CVE-2025-40594 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over local access with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability low.
Is CVE-2025-40594 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-40594?: CVE-2025-40594 primarily affects Siemens Sinamics G220 Firmware. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-40594?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-40594 have an EU (EUVD) identifier?: Yes. CVE-2025-40594 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-27242.
When was CVE-2025-40594 published?: CVE-2025-40594 was published on 2025-09-09 and last updated on 2026-06-17.

References

https://cert-portal.siemens.com/productcert/html/ssa-027652.html

Affected products (5)

cpe:2.3:o:siemens:sinamics_g220_firmware:6.4:-:*:*:*:*:*:*
cpe:2.3:o:siemens:sinamics_g220_firmware:6.4:hf1:*:*:*:*:*:*
cpe:2.3:o:siemens:sinamics_s200_firmware:6.4:*:*:*:*:*:*:*
cpe:2.3:o:siemens:sinamics_s210_firmware:6.4:-:*:*:*:*:*:*
cpe:2.3:o:siemens:sinamics_s210_firmware:6.4:hf1:*:*:*:*:*:*

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