CVE-2026-18397

SConnect: Native Host Unauthenticated Remote Code Execution Vulnerability

State: Published
Severity: 9.4 Critical
Published: Oct 1, 2026
Updated: Oct 2, 2026
Reserved: Jul 30, 2026

Description

This vulnerability enables unauthenticated remote code execution (RCE) on a victim's machine by exploiting a combination of cryptographic weaknesses and memory management issues in the SConnect native host component.

The attack leverages an unrestricted messaging interface between an attacker-controlled web page and the native host, allowing malicious input to bypass security checks.

Scores

CVSS	Score	Vector	Source
4.0	9.4 Critical	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H	THA-PSIRT

Weaknesses

CWE-347 Improper verification of cryptographic signature
CWE-130 Improper handling of length parameter inconsistency
CWE-457 Use of uninitialized variable
CWE-252 Unchecked return value

Affected Products

Product	Versions
SConnectThales	before 2.16.1.0Affected

References

https://www.thalesgroup.com/en/product-security-incident-responsevendor-advisory

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