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Sd 330Ac EUVDEUVD-2026-23751

| CVE-2026-32958 MEDIUM
Use of Hard-coded Cryptographic Key (CWE-321)
2026-04-20 jpcert GHSA-w7w2-59m3-j62x
Information Disclosure Sd 330Ac Amc Manager
6.9
CVSS 4.0 · NVD
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Severity by source

NVD PRIMARY
6.9 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
A
Scope
X

Lifecycle Timeline

5
CVSS changed
Apr 20, 2026 - 04:22 NVD
6.5 (MEDIUM) 6.9 (MEDIUM)
Analysis Generated
Apr 20, 2026 - 04:10 vuln.today
EUVD ID Assigned
Apr 20, 2026 - 04:00 euvd
EUVD-2026-23751
Analysis Generated
Apr 20, 2026 - 04:00 vuln.today
CVE Published
Apr 20, 2026 - 03:19 nvd
MEDIUM 6.9

DescriptionCVE.org

SD-330AC and AMC Manager provided by silex technology, Inc. use a hard-coded cryptographic key. An administrative user may be directed to apply a fake firmware update.

AnalysisAI

Hard-coded cryptographic keys in Silex Technology SD-330AC and AMC Manager enable attackers to forge firmware updates that administrative users may be tricked into applying via social engineering, allowing arbitrary firmware installation without detection. The vulnerability affects all versions of both products and exploits a fundamental key management flaw (CWE-321). …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Reverse-engineer firmware to extract hard-coded key
Delivery
Craft malicious firmware image and sign it
Exploit
Deliver phishing email impersonating Silex support
Execution
Social engineer admin to click update link
Persist
Administrator applies fake firmware via AMC Manager
Impact
Malicious code executes on SD-330AC hardware
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Vulnerability AssessmentAI

Exploitation Hard-coded cryptographic key must be obtained or derived by the attacker - this typically requires firmware reverse-engineering, leaked documentation, or public disclosure of the key material. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment CVSS and real-world signals present a moderate-to-significant risk profile with important nuance. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker reverse-engineers the SD-330AC firmware or obtains the hard-coded cryptographic key through public research or supply-chain exposure, then crafts a malicious firmware image signed with the legitimate key. The attacker sends a phishing email to a network administrator managing SD-330AC devices, impersonating Silex support with a fake 'critical security update' link or attachment. …
Remediation Silex Technology has not provided explicit patch version information in available references - verify directly with vendor at https://www.silex.jp/support/security-advisories/en/2026-001 for the specific patched version and availability timeline. … Detailed patch versions, workarounds, and compensating controls in full report.
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EUVD-2026-23751 vulnerability details – vuln.today
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