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TI-2025-27063 Aliases CVE-2025-40579GHSA-455w-hjgq-78wr

Stack-based buffer overflow in Siemens SCALANCE LPE9403

Priority LOW 26CWE-121Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
Passive
Attack complexity
High
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00167 5th percentileScored 2026-11-07
Fix Fixed SCALANCE LPE9403 (Siemens): V4.0 HF0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
SiemensSCALANCE LPE9403before V4.0 HF0V4.0 HF0Patch availableCNA
  • SCALANCE LPE9403 VendorSiemens Affected before V4.0 HF0 Fixed in V4.0 HF0 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:siemens:scalance_lpe9403_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableSiemens
cpe:2.3:h:siemens:scalance_lpe9403:-:*:*:*:*:*:*:*not specified by NVDRunning onSiemens
  • cpe:2.3:o:siemens:scalance_lpe9403_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Siemens
  • cpe:2.3:h:siemens:scalance_lpe9403:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens

Remediation

  • Fix · CNA SCALANCE LPE9403 (Siemens) Fixed in V4.0 HF0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Siemens SCALANCE LPE9403 V4.0 HF0

    8 records Highest priority Priority LOW 8 LOW

    Other records, highest priority first

    • TI-2025-27058 Incorrect permission assignment in Siemens SCALANCE LPE9403Priority LOW 38
    • TI-2025-27057 Path traversal in Siemens SCALANCE LPE9403Priority LOW 29
    • TI-2025-27056 Incorrect permission assignment in Siemens SCALANCE LPE9403Priority LOW 29
    Show all 8 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-40579
  2. 2026-10-03 Alias added: GHSA-455w-hjgq-78wr

References

Advisory 1

  • TI-2022-00753 A flaw was found in the way the "flags" member of the new pipe buffer structure was… KEVCVSS 3.1HIGH 7.8
  • TI-2021-02923 Out-of-bounds write in polkit KEVCVSS 3.1HIGH 7.8
  • TI-2021-02413 NULL pointer deref in signature_algorithms processing CVSS 3.1MEDIUM 5.9
  • TI-2023-12139 Command injection in Siemens SCALANCE LPE9403 CVSS 3.1CRITICAL 9.9
  • TI-2025-20231 A vulnerability has been identified in SCALANCE LPE9403 (6GK5998-3GS00-2AC2) (All… CVSS 4.0HIGH 8.7
  • TI-2025-20230 Path traversal in Siemens SCALANCE LPE9403 CVSS 4.0HIGH 8.6
See all 26 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences