How severe is CVE-2025-40579?

CVE-2025-40579 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-40579 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-40579?

CVE-2025-40579 affects Siemens Scalance Lpe9403 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-40579?

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

Does CVE-2025-40579 have an EU (EUVD) identifier?

Yes. CVE-2025-40579 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-14667.

When was CVE-2025-40579 published?

CVE-2025-40579 was published on 2025-05-13 and last updated on 2026-06-17.

CVE-2025-40579

CVE-2025-40579 is a medium-severity vulnerability in Siemens Scalance Lpe9403 Firmware with a CVSS 3.x base score of 6.7. 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-787.

Key facts

Severity: Medium (CVSS 3.x base score 6.7)
CVSS v4: 5.4
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-14667
Weakness: CWE-787
Affected product: Siemens Scalance Lpe9403 Firmware
Published: 2025-05-13
Last modified: 2026-06-17

Description

A vulnerability has been identified in SCALANCE LPE9403 (6GK5998-3GS00-2AC2) (All versions < V4.0 HF0). Affected devices are vulnerable to a stack-based buffer overflow. This could allow a non-privileged local attacker to execute arbitrary code on the device or to cause a denial of service condition.

Frequently asked questions

What is CVE-2025-40579?: A vulnerability has been identified in SCALANCE LPE9403 (6GK5998-3GS00-2AC2) (All versions < V4.0 HF0). Affected devices are vulnerable to a stack-based buffer overflow. This could allow a non-privileged local attacker to execute arbitrary code on the device or to cause a denial of service condition.
How severe is CVE-2025-40579?: CVE-2025-40579 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-40579 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-40579?: CVE-2025-40579 affects Siemens Scalance Lpe9403 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-40579?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-40579 have an EU (EUVD) identifier?: Yes. CVE-2025-40579 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-14667.
When was CVE-2025-40579 published?: CVE-2025-40579 was published on 2025-05-13 and last updated on 2026-06-17.

References

https://cert-portal.siemens.com/productcert/html/ssa-327438.html

Affected products (1)

cpe:2.3:o:siemens:scalance_lpe9403_firmware:-:*:*:*:*:*:*:*

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