EUVD-2026-39403
GHSA-c3rx-2jmc-fr2c
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/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
Network-reachable over Zigbee with low complexity, but attacker must be a joined network device (PR:L); impact is process termination only, so A:H with C:N/I:N.
Primary rating from Vendor (Silabs).
CVSS VectorVendor: Silabs
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/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
Lifecycle Timeline
1DescriptionCVE.org
In EmberZNet v9.0.2 and earlier, malformed GetGroupMembership commands can trigger repeated reads past the end of the message payload and terminate the process. These messages must come from a device that has already joined the network, and no information leakage back to the sender was observed. Only devices supporting the Groups cluster may be impacted.
AnalysisAI
Denial of service in Silicon Labs EmberZNet Zigbee stack (v9.0.2 and earlier) allows an already-joined network device to crash a target by sending malformed GetGroupMembership commands, which cause repeated out-of-bounds reads past the message payload and terminate the process. Only devices implementing the Groups cluster are affected, and no information leakage to the sender was observed despite the read primitive. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to operate a device that has already successfully joined the target's Zigbee network (PR:L) - an outside/unjoined attacker cannot reach the handler - and the target must be an EmberZNet device that supports the ZCL Groups cluster. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Signals are internally consistent and point to a moderate, availability-focused issue rather than a top-tier emergency. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who controls or compromises a device already joined to the Zigbee network crafts a malformed GetGroupMembership command and sends it to a Groups-cluster-capable EmberZNet target. The over-read past the payload terminates the target's process, taking that node offline; repeating the message sustains the outage. … |
| Remediation | Upgrade EmberZNet to a fixed release beyond 9.0.2 as published in the Silicon Labs SDK; a patch is available per the vendor advisory, but no exact fixed version string was provided in the source data, so confirm the precise patched build against the Silicon Labs advisory (https://siliconlabs.lightning.force.com/sfc/servlet.shepherd/document/download/069Vm00000pEGPQIA4?operationContext=S1) and the SDK release tags at https://github.com/SiliconLabsSoftware/sisdk-release/ before deployment. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
24 hours: Inventory all EmberZNet deployments and identify devices running v9.0.2 or earlier that implement the Groups cluster. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
TouchLink packets processed after timeout or out of range due to Operation on a Resource after Expiration and Missing Re
Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Silicon Labs Ember ZNet allows
A malformed packet causes a stack overflow in the Ember ZNet stack. Rated high severity (CVSS 7.5), this vulnerability i
Remote denial of service in Silicon Labs EmberZNet Zigbee stack (v9.0.2 and earlier) lets an already-joined network devi
Denial of service in Silicon Labs EmberZNet Zigbee stack (v9.0.2 and earlier) allows a device already joined to the Zigb
Denial of service in Silicon Labs EmberZNet (Zigbee stack) v9.0.2 and earlier allows an already-joined network device to
Out-of-bounds memory writes in Silicon Labs EmberZNet (Zigbee stack) v9.0.2 and earlier allow an already-joined network
Denial of service in Silicon Labs EmberZNet (Zigbee stack) versions 9.0.2 and earlier allows an already-joined network d
Denial of service in Silicon Labs EmberZNet Zigbee stack (v9.0.2 and earlier) lets an already-joined network device cras
Out-of-bounds read in the Silicon Labs EmberZNet Zigbee stack (v9.0.2 and earlier) lets an already-joined network device
Denial of service in Silicon Labs EmberZNet Zigbee stack (v9.0.2 and earlier) lets an already-joined network device cras
Denial of service in Silicon Labs EmberZNet Zigbee stack (v9.0.2 and earlier) allows an already-joined network device to
Same weakness CWE-125 – Out-of-bounds Read
View allSame technique Buffer Overflow
View allShare
External POC / Exploit Code
Leaving vuln.today