SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2023-27407

A vulnerability has been identified in SCALANCE LPE9403 (All versions < V2.1).

CRITICAL 9.9EPSS 1.30%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (1.30%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

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.

CVSS 3.1
9.9 CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS
1.30% probability · 70th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-77, CWE-78
Affected
siemens/scalance lpe9403 firmware
Source
productcert@siemens.com
EPSS trend
0%3%5%7 October 2026: 1.30%7 October 20267 October 2026

EPSS 1.3% since 7 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.