Samsung Mobile Devices CVE-2026-21047

We need to produce a comprehensive analysis for CVE-2026-21047. Let's gather all provided data: CVE ID, description: "Out-of-bounds write in ImsService prior to SMR Jul-2026 Release 1 allows remote attackers to potentially execute arbitrary code." CVSS Score 8.3 (but note vector is CVSS:4.0, not 3.1, although score provided as 8.3, which is moderate? Actually CVSS 4.0 base score 8.3 is high, not critical). Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N. CWE N/A. Multi-source: Reported by SamsungMobile, CPE: cpe:2.3:a:samsung_mobile:samsung_mobile_devices:*:*:*:*:*:*:*:* (no version bound). Tags: RCE, Buffer Overflow, Samsung Mobile Devices. References: [cveorg] (None) https://security.samsungmobile.com/securityUpdate.smsb?year=2026&month=07. No KEV status mentioned, no EPSS, no POC availability in input. So exploitation status: "no public exploit identified at time of analysis". No patch version explicitly given except "prior to SMR Jul-2026 Release 1", which implies fix in that release. So patch status: "Vendor-released patch: SMR Jul-2026 Release 1". However, we need to check if the patch version is exact. The description says "prior to SMR Jul-2026 Release 1", meaning the fix is in that release. So we can state the patched version is "SMR Jul-2026 Release 1". But we need to be precise: "SMR Jul-2026 Release 1" is a version string for Samsung Mobile devices security maintenance release. So remediation: upgrade to SMR Jul-2026 Release 1. No workarounds mentioned. No EPSS, so risk assessment must note the CVSS 4.0 vector but we need to produce an assessed CVSS 3.1 vector as well? The output includes "assessed_cvss_vector" (3.1) and "assessed_cvss40_vector". I need to independently assess the vulnerability based on description and conditions. The description: Out-of-bounds write in ImsService prior to SMR Jul-2026 Release 1 allows remote attackers to potentially execute arbitrary code. The CVSS 4.0 provided: AV:N, AC:L, AT:P, PR:N, UI:N, VC:N