Silicon Labs EFR32xxx parts with classic key storage do not use hardware accelerated AES-CCM
Priority MEDIUM 42CWE-1240Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-327.
Summary
Ember ZNet between v7.2.0 and v7.4.0 used software AES-CCM instead of integrated hardware cryptographic accelerators, potentially increasing risk of electromagnetic and differential power analysis sidechannel attacks.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00244 15th percentileScored 2026-11-07
Fix Fixed Ember ZNet SDK (silabs.com): 7.4.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| silabs.com | Ember ZNet SDK | 7.2.0 to before 7.4.0 | 7.4.0 | Patch available | CNA |
- Ember ZNet SDK Vendorsilabs.com Affected 7.2.0 to before 7.4.0 Fixed in 7.4.0 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:silabs:emberznet:*:*:*:*:*:*:*:* | 7.2.0 – 7.2.4 | Vulnerable | silabs.com |
- cpe:2.3:a:silabs:emberznet:*:*:*:*:*:*:*:* Versions 7.2.0 – 7.2.4 Vulnerable ·silabs.com
Remediation
- Fix · CNA Ember ZNet SDK (silabs.com) Fixed in 7.4.0
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
silabs.com Ember ZNet SDK 7.4.0
2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2023-28049 Potential DoS for EFR32xxx parts in high traffic environments due to null buffer dereference / crashPriority LOW 39
Timeline
- 2026-10-02 Threatist record created from CVE-2023-51392
- 2026-10-03 Alias added: GHSA-qfrv-fmc5-hmmh
References
More silabs.com Emberznet vulnerabilities
- TI-2023-21716 Touchlink authentication bypass due to packets processed after timeout or out of range in Ember ZNet CVSS 3.1CRITICAL 10.0
- TI-2022-08741 Malformed Zigbee packet causes Assert in EmberZNet 7.0.0 or earlier CVSS 3.1CRITICAL 9.8
- TI-2022-08742 Malformed Zigbee packet causes Assert in EmberZNet 7.0.1 or earlier CVSS 3.1HIGH 7.5
- TI-2023-28049 Potential DoS for EFR32xxx parts in high traffic environments due to null buffer dereference / crash CVSS 3.1HIGH 7.5
- TI-2023-28048 Potential DoS due to BusFault and Assert in Ember ZNet legacy packet buffer CVSS 3.1HIGH 7.5
- TI-2026-34744 Simple Metering GetProfileResponse interval-bounds bug in EmberZNet v9.0.2 CVSS 4.0HIGH 7.1
Sources
- CVE-2023-51392 · CVE Program
- CVE-2023-51392 · NVD
- FIRST EPSS
- GHSA-qfrv-fmc5-hmmh · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences