A vulnerability has been identified in SIMATIC CN 4100 (All versions < V2.5).

published 2023-07-11 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-32733

cvss: 9.9; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 47%
public exploits: 0; none known

A vulnerability has been identified in SIMATIC CN 4100 (All versions < V2.5). Affected device consists of improper access controls in the configuration files that leads to privilege escalation. An attacker could gain admin access with this vulnerability leading to complete device control.

Patch / fix

fixed in 1 links 1

siemens simatic_cn_4100_firmware 2.5

cert-portal.siemens.com/productcert/pdf/ssa-313488.pdf advisory

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-23-194-03 updated 2025-05-06 cvss 9.9

Siemens SIMATIC CN 4100

Siemens SIMATIC CN 4100 <V2.5
affected: fixed in V2.5 support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 23 mo ago (2024-11-12)

Exploit prediction

0.56% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	9.9	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C
CNA	3.1	9.9	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
NVD	3.1	10.0	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

Siemens SIMATIC CN 4100

Classification

Weakness

CWE-284 Improper Access Control

References

cert-portal.siemens.com /productcert/pdf/ssa-313488.pdf
patch, vendor-advisory

Sources

CVE List CVE-2023-29130
NVD CVE-2023-29130

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary