CVE-2025-40579

Local code execution via stack buffer overflow

Published May 13, 2025 · Updated Jul 8, 2025

Stack-based buffer overflow in Siemens SCALANCE LPE9403 before 4.0 HF0 allows local users to execute arbitrary code or interrupt service. Siemens has not disclosed the affected component, triggering input, or unchecked operation beyond identifying the stack overwrite. Exploitation requires low-privileged local access and user interaction; successful use can run code on the device or stop its service.

CVSS severity5.4
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in Siemens SCALANCE LPE9403 before 4.0 HF0 allows local users to execute arbitrary code or interrupt service. Siemens has not disclosed the affected component, triggering input, or unchecked operation beyond identifying the stack overwrite. Exploitation requires low-privileged local access and user interaction; successful use can run code on the device or stop its service.

The record

CVE
CVE-2025-40579
Published
May 13, 2025
Updated
Jul 8, 2025
Vendor
Siemens
Product
SCALANCE LPE9403
Classifications
CWE-787, CWE-121, T1203
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 13, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 8, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <V4.0 HF0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Siemens · SCALANCE LPE9403version=0 <V4.0 HF0

Published CVSS scores

6.7Siemens AGCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
7.8NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.4Siemens AGCVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-121Stack-based Buffer Overflow
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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