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Amc Manager CVE-2026-32962

| EUVDEUVD-2026-23755 MEDIUM
Missing Authentication for Critical Function (CWE-306)
2026-04-20 jpcert GHSA-mmj2-4xv2-5qh8
6.9
CVSS 4.0 · NVD
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Network reconnaissance identifies SD-330AC or AMC Manager
  2. Delivery
    Send unauthenticated configuration request
  3. Exploit
    Modify device or application settings
  4. Execution
    Change persists on device
  5. Impact
    Security posture or operational behavior altered

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A07:2025 - Authentication Failures
ASVS 5.0
V6 - Authentication Authentication required for critical functions
MITRE ATT&CK

1 technique across 1 tactic: Initial Access

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Exploitation requires the SD-330AC or AMC Manager to be network-accessible (directly or via management network) and the target functions must be exposed without authentication. No special configuration is required - the vulnerability exists in default deployments. Limiting factors: the attacker must know or discover the IP address and management interface port of the device, and must be able to reach it over the network; if the device is isolated on an internal-only network without internet routing, network-based attacks are prevented. The impact is limited to configuration integrity; the attacker cannot read sensitive data (confidentiality unaffected per CVSS) nor directly disable the device (availability unaffected).

Impact

The CVSS vector (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N) confirms network-accessible unauthenticated access with low attack complexity and no user interaction required, placing the attack surface at maximum exposure. However, the integrity impact is rated 'Low' (I:L) rather than 'High,' and confidentiality and availability are unaffected, resulting in a moderate 5.3 score. The practical risk depends on what 'device configuration' entails: if it includes disabling security features, redirecting traffic, or exfiltrating logs, the real impact could exceed the CVSS rating. Conversely, if configuration changes are easily reversible or monitored, risk is lower. No KEV status, active exploitation reports, or public POC have been identified, suggesting this is either nascent or affects a niche product. Organizations using SD-330AC or AMC Manager should prioritize assessment of what configurations are exposed; this is a high-likelihood/medium-impact authentication bypass rather than a low-probability attack.

Exploit ScenarioDerived

An attacker on the network sends an unauthenticated HTTP or API request to the SD-330AC or AMC Manager management endpoint, specifying a configuration change such as modifying network settings, disabling logging, or altering security policies. The request is accepted without credential verification and the configuration is altered. The attacker causes the device to behave maliciously or to stop enforcing security controls, potentially enabling lateral movement, data exfiltration, or disruption.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Apr 20, 2026

SD-330AC and AMC Manager by Silex Technology lack authentication controls on critical configuration functions, allowing remote attackers to modify device settings without credentials. The CVSS score of 5.3 reflects network-accessible integrity impact with no complexity barrier, though confidentiality and availability are not directly affected. No active exploitation has been confirmed in CISA KEV or public exploit repositories at the time of analysis.

RemediationAI

Consult Silex Technology's security advisories (https://www.silex.jp/support/security-advisories/en/2026-001) for patched firmware or software versions; specific fix versions are not confirmed in available data. As an interim compensating control, restrict network access to SD-330AC and AMC Manager management interfaces using firewall rules or network segmentation - permit only connections from trusted administrative subnets and block unauthenticated access from untrusted networks. Monitor configuration changes via access logs if the product supports them, and document current baseline configurations so unauthorized modifications are detectable. If the product supports authentication configuration, enable it immediately and enforce strong credentials. These mitigations reduce exposure but do not eliminate the underlying design flaw; patching remains the primary remediation once available.

Affected VersionsENISA

SD-330AC Ver.1.42 and earlier
AMC Manager Ver.5.0.2 and earlier

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The SD-330AC is a network device and AMC Manager is an administrative management application produced by Silex Technology. Both products expose configuration functions across the network without enforcing authentication checks, a violation of CWE-306 (Missing Authentication for Critical Function). This root cause indicates that critical administrative operations - such as modifying device settings, network parameters, or management configurations - are accessible via unauthenticated API endpoints or web interfaces. The CVE affects all versions of both products according to available CPE data, suggesting the vulnerability is endemic to the product design rather than introduced in a specific release.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Vulnerable system: Confidentiality
None
Vulnerable system: Integrity
Low
Vulnerable system: Availability
None
Subsequent system: Confidentiality
None
Subsequent system: Integrity
None
Subsequent system: Availability
None

Lifecycle Timeline

2
CVSS changed
Apr 20, 2026 - 04:22 NVD
5.3 (MEDIUM) 6.9 (MEDIUM)
CVE Published
Apr 20, 2026 - 03:18 nvd
MEDIUM 6.9

DescriptionCVE.org

SD-330AC and AMC Manager provided by silex technology, Inc. contain a missing authentication for critical function issue. The device configuration may be altered without authentication.

Threat Intelligence Overview

EPSS Score
0.0%
Top 86% exploitable
Threat Intel
1
1 source
Social Media
1
Sightings
Data Quality
6 sources
Confidence: High

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.0%
Patch available No
Active threat Yes
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
Yes
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

44
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +34
PoC: 0
Weaponized: 0
Threat intel: +10
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Threat IntelligenceMISP

CISA Advisories
Sources: CISA (public domain)

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