Security readout for executives and security teams
Plain-English summary
This CVE concerns Silicon Labs Ember ZNet firmware using software AES-CCM instead of hardware crypto on EFR32xxx devices with classic key storage. The main business risk is exposure of cryptographic secrets through physical side-channel analysis, not remote compromise.
Executive priority
Treat as a targeted embedded-device confidentiality risk. It is not currently supported as internet-scale exploitation, but products in hostile or physically accessible environments should be assessed promptly.
Technical view
Ember ZNet v7.2.0 to v7.4.0 reportedly used software AES-CCM rather than integrated hardware accelerators, increasing electromagnetic and differential power analysis risk. CVSS is 6.2 with local attack vector and high confidentiality impact. The bundle explicitly lists Ember ZNet SDK 7.2.0 as affected.
Likely exposure
Organizations with deployed EFR32xxx-based products using affected Ember ZNet SDK builds and classic key storage have plausible exposure, especially where attackers can physically access devices.
Exploitation context
No KEV listing or cited evidence of active exploitation is provided. Exploitation appears to require local physical access and side-channel capability, making it more relevant to device capture, lab analysis, and targeted attacks.
Researcher notes
Evidence is limited to the provided CVE data and Silicon Labs reference URL. The exact fixed version or vendor mitigation is not included in the bundle, so avoid assuming a patch path without advisory confirmation.
Mitigation direction
- Check Silicon Labs guidance for fixed SDK versions or approved mitigations.
- Inventory EFR32xxx products and firmware built with Ember ZNet 7.2.0 through 7.4.0.
- Prioritize devices using classic key storage in physically exposed environments.
- Ask suppliers or integrators for written affected-version and remediation status.
- Limit physical access to exposed devices until vendor guidance is applied.
Validation and detection
- Review firmware build manifests for Ember ZNet SDK version evidence.
- Confirm whether products use EFR32xxx parts with classic key storage.
- Compare deployed firmware against Silicon Labs advisory scope.
- Request vendor attestation for AES-CCM implementation and SDK version.
- Track remediation evidence in vulnerability management records.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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Open ATT&CK lookupCVE-2023-51392 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N2.53.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.2MediumVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://community.silabs.com/068Vm000001BKm6CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Use of a Cryptographic Primitive with a Risky Implementation
Use of a Cryptographic Primitive with a Risky Implementation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.