TI-2021-18548 Aliases CVE-2021-42027 GHSA-qf34-j4vq-q329

Improper certificate validation in Siemens SINUMERIK Edge

LOW 33CWE-295Published 2021-12-14 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: High
Impact type: Spoofing
Confidentiality · integrity · availability: High · High · None
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-295.

Summary

A vulnerability has been identified in SINUMERIK Edge (All versions < V3.2). The affected software does not properly validate the server certificate when initiating a TLS connection. This could allow an attacker to spoof a trusted entity by interfering in the communication path between the client and the intended server.

Why it matters now

EPSS 0.00495 42nd percentileScored 2026-11-07

Fix Fixed SINUMERIK Edge (Siemens): V3.2

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Siemens	SINUMERIK Edge	before V3.2	V3.2	Patch available	CNA

SINUMERIK Edge VendorSiemens Affected before V3.2 Fixed in V3.2 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:siemens:sinumerik_edge::::::::	before 3.2	Vulnerable	Siemens

cpe:2.3:a:siemens:sinumerik_edge:*:*:*:*:*:*:*:* Versions before 3.2 Vulnerable ·Siemens

Remediation

Fix · CNA SINUMERIK Edge (Siemens) Fixed in V3.2

Timeline

2026-10-02 Threatist record created from CVE-2021-42027
2026-10-03 Alias added: GHSA-qf34-j4vq-q329

References

Patch 1

https://cert-portal.siemens.com/productcert/pdf/ssa-523250.pdf

TI-2021-02923 Out-of-bounds write in polkit KEVCVSS 3.1HIGH 7.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences