How severe is CVE-2025-27393?

CVE-2025-27393 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-27393 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-27393?

CVE-2025-27393 affects Siemens Scalance Lpe9403 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-27393?

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

Does CVE-2025-27393 have an EU (EUVD) identifier?

Yes. CVE-2025-27393 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-7763.

When was CVE-2025-27393 published?

CVE-2025-27393 was published on 2025-03-11 and last updated on 2026-06-17.

CVE-2025-27393

CVE-2025-27393 is a high-severity vulnerability in Siemens Scalance Lpe9403 Firmware with a CVSS 3.x base score of 7.2. 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-78.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v4: 8.6
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-7763
Weakness: CWE-78
Affected product: Siemens Scalance Lpe9403 Firmware
Published: 2025-03-11
Last modified: 2026-06-17

Description

A vulnerability has been identified in SCALANCE LPE9403 (6GK5998-3GS00-2AC2) (All versions < V4.0). Affected devices do not properly sanitize user input when creating new users. This could allow an authenticated highly-privileged remote attacker to execute arbitrary code on the device.

Frequently asked questions

What is CVE-2025-27393?: A vulnerability has been identified in SCALANCE LPE9403 (6GK5998-3GS00-2AC2) (All versions < V4.0). Affected devices do not properly sanitize user input when creating new users. This could allow an authenticated highly-privileged remote attacker to execute arbitrary code on the device.
How severe is CVE-2025-27393?: CVE-2025-27393 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-27393 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-27393?: CVE-2025-27393 affects Siemens Scalance Lpe9403 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-27393?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-27393 have an EU (EUVD) identifier?: Yes. CVE-2025-27393 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-7763.
When was CVE-2025-27393 published?: CVE-2025-27393 was published on 2025-03-11 and last updated on 2026-06-17.

References

https://cert-portal.siemens.com/productcert/html/ssa-075201.html

Affected products (1)

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

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