CVE-2023-27407: A vulnerability has been identified in SCALANCE LPE9403 (All versions < V2.1)

Q: How do I fix CVE-2023-27407?

scalance lpe9403 firmware: upgrade to 2.1. Exact commands for each OS are on this page.

Q: Is CVE-2023-27407 being exploited?

CVE-2023-27407 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-27407 affect?

CVE-2023-27407 affects scalance lpe9403 firmware. Severity is critical (CVSS 9.9). A vulnerability has been identified in SCALANCE LPE9403 (All versions < V2.1). The web based management of affected device does not properly validate user input, making it susceptible to command injection. This could allow an authenticated

Q: How urgent is CVE-2023-27407?

Priority 52/100. Critical severity

This month

CRITICAL 9.9UPGRADE

CVE-2023-27407 is a critical-severity flaw (CVSS 9.9) 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 web based management of affected device does not properly validate user input, making it susceptible to command injection. This could allow an authenticated remote attacker to access the underlying operating system as the root user.

Why this priority

Critical severity

A fixed release or distro patch exists.

Risk facts

CVSS score	9.9 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.3% (top 30%)
CISA exploited list	No
Weakness	CWE-77, CWE-78
Published	2023-05-09
Last modified	2026-10-24

Publisher (CNA): Siemens AG · Vendor: siemens

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-05-09 13:15 UTCPublished CVE record published
2026-10-24 13:10 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.

Exact fixes by distribution

Fedora 46 · gnome-shell-extension-tiling-assistant · FIXED · 56-1.fc46 · FEDORA-2026-ebf66a5321 · source

sudo dnf upgrade --advisory=FEDORA-2026-ebf66a5321

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.

Quick answers

How do I fix CVE-2023-27407?

scalance lpe9403 firmware: upgrade to 2.1. Exact commands for each OS are on this page.

Is CVE-2023-27407 being exploited?

CVE-2023-27407 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-27407 affect?

CVE-2023-27407 affects scalance lpe9403 firmware. Severity is critical (CVSS 9.9). A vulnerability has been identified in SCALANCE LPE9403 (All versions < V2.1). The web based management of affected device does not properly validate user input, making it susceptible to command injection. This could allow an authenticated

How urgent is CVE-2023-27407?

Priority 52/100. Critical severity

Related CVEs

CVE-2023-27409 LOW 2.5 UPGRADE A vulnerability has been identified in SCALANCE LPE9403 (All versions < V2.1)
CVE-2023-27408 LOW 3.3 UPGRADE A vulnerability has been identified in SCALANCE LPE9403 (All versions < V2.1)

References

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