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Vulnerability record · CVE-2026-18397 · published 1 October 2026

CVE-2026-18397: Unchecked return value vulnerability

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.

9.4 CVSS 4.0 Critical EPSS 0.34% · top 75.2% CWE-130 · CWE-130CWE-252 · Unchecked return value Deferred
9.4CVSS 4.0 base score
0.34%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
2 Oct 2026Last modified by NVD

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.

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:

References

LinkTags
https://www.thalesgroup.com/en/product-security-incident-response

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.7CVE-2025-14847MongoDB Server heap memory disclosure via compressed protocol headersMismatched length fields in Zlib-compressed protocol headers let an unauthenticated client trigger a read of uninitialized heap memory in MongoDB Ser…KEVEPSS 83%analysed

Source: NIST National Vulnerability Database (record CVE-2026-18397), CISA KEV, FIRST EPSS (scores of 2026-10-02). This page is refreshed as NVD updates the record.