CVE-2023-27408: A vulnerability has been identified in SCALANCE LPE9403 (All versions < V2.1)

Routine

LOW 3.3UPGRADE

CVE-2023-27408 is a low-severity flaw (CVSS 3.3) affecting scalance lpe9403 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability has been identified in SCALANCE LPE9403 (All versions < V2.1). The `i2c` mutex file is created with the permissions bits of `-rw-rw-rw-`. This file is used as a mutex for multiple applications interacting with i2c. This could allow an authenticated attacker with access to the SSH interface on the affected device to interfere with the integrity of the mutex and the data it protects.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	3.3 (Low)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 94%)
CISA exploited list	No
Weakness	CWE-378
Published	2023-05-09
Last modified	2026-10-23

Publisher (CNA): Siemens AG · Vendor: siemens

Am I affected?

Timeline

2023-05-09 13:15 UTCPublished CVE record published
2026-10-23 23:10 UTCUpdated Record last modified

siemens scalance lpe9403 firmware UPGRADE

Affected: < 2.1

Fixed in: 2.1

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

References

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