TI-2026-79280 Aliases CVE-2026-85079 GHSA-4crr-j758-m3h5

Out-of-bounds write in Zigbee Simple_Desc_req handling

LOW 36CWE-121Published 2026-10-22 · Updated 2026-10-22

Key facts

Attack vector: Adjacent network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: Present
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

Summary

Silicon Labs EmberZNet versions through 9.1.1 contain an out-of-bounds write when handling a malformed Simple_Desc_req response (CWE-121). The malformed response must come from a device that has already joined the network, and an attacker must wait for a Simple_Desc_req before the attack can be performed. The write can potentially lead to remote code execution.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

In EmberZNet 9.1.1 and earlier, a malformed Simple_Desc_req response can result in an out-of-bounds write potentially leading to remote code execution. This response must come from a device that has already joined the network, and the attacker must wait for a Simple_Desc_req before the attack can be performed.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00655 51st percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

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	EmberZNet	up to 9.1.1	—	No fix listed	CNA

EmberZNet Vendorsilabs.com Affected up to 9.1.1 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:silabs:emberznet::::::::	up to 9.1.1	Vulnerable	silabs.com

cpe:2.3:a:silabs:emberznet:*:*:*:*:*:*:*:* Versions up to 9.1.1 Vulnerable ·silabs.com

Remediation

The sources list no fixed version for EmberZNet.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Advisory · 2026-10-22
Silicon Labs EmberZNet — github.com/SiliconLabsSoftware/docs-security-advisories/blo…
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2026-79285 Out-of-bounds write in Zigbee Publish Price Matrix handlingPriority LOW 36
Show all 2 records → Advisory →

Timeline

2026-10-22 Threatist record created from CVE-2026-85079
2026-10-22 Alias added: GHSA-4crr-j758-m3h5
2026-10-22 CISA SSVC decision points changed
2026-10-22 Priority changed: MEDIUM → LOW
2026-10-29 CVSS score added · NVD
2026-10-30 EPSS moved to the 50th–90th percentile

References

Patch 1

https://github.com/SiliconLabsSoftware/docs-security-advisories/blob/main/Advisories/500-599/A-00000589.md

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-2023-28047 Silicon Labs EFR32xxx parts with classic key storage do not use hardware accelerated AES-CCM 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

See all 21 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences