SConnect: Native Host Unauthenticated Remote Code Execution Vulnerability

published 2026-10-01 38 d ago modified 2026-10-02 37 d ago also EUVD-2026-91132

cvss: 9.4; version 4.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 28%
public exploits: 0; none known

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.

Patch / fix

fixed in 1

Thales SConnect 2.16.1.0

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 37 d ago (2026-10-02)

Exploit prediction

0.34% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	9.4	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
CNA	4.0	9.4	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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

Thales SConnect

Classification

Weakness

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

References

thalesgroup.com /en/product-security-incident-response
vendor-advisory

Sources

CVE List CVE-2026-18397
NVD CVE-2026-18397

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