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CVE-2026-47147· NVD / CVE Program· CNA Silabs

OTA server raw parser missing per-field bounds validation in EmberZNet v9.0.2

In EmberZNet v9.0.2 and earlier, malformed OTA requests can drive the OTA server parser into out-of-bounds reads. A limited amount of data from RAM is read back to the requester. The size and location of this data is limited. These requests must come from a device that has already joined the network. Only devices supporting the OTA Server cluster may be impacted.

HighCVSS 7.1 · v4.0—No exploit No fix recorded
Published
Jun 25, 2026
Updated
Jun 25, 2026
EPSS
0.4% · 32th percentile
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Report tools

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Action score

28

Monitor

Low priority for now.

CVSS
28 / 40 · 7.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Silabs
7.1
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

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Affected systems

VendorProduct
silabsemberznet

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • silabs emberznetup to 9.0.2 inclusive

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Silabs). Independent of NVD's CPE analysis and usually ahead of it.

  • Silicon Labs EmberZNet

    • up to and including 9.0.2affected · semver

Same product

silabs: all records

Other highest-scoring records for the same primary product.

  • CVE-2023-51392Silicon Labs EFR32xxx parts with classic key storage do not use hardware accelerated AES-CCM
    39Monitor
  • CVE-2023-41094Touchlink authentication bypass due to packets processed after timeout or out of range in Ember ZNet
    39Monitor
  • CVE-2022-24937Malformed Zigbee packet causes Assert in EmberZNet 7.0.0 or earlier
    39Monitor
  • CVE-2023-51394Potential DoS for EFR32xxx parts in high traffic environments due to null buffer dereference / crash
    30Monitor
  • CVE-2023-51393Potential DoS due to BusFault and Assert in Ember ZNet legacy packet buffer
    30Monitor
  • CVE-2022-24938Malformed Zigbee packet causes Assert in EmberZNet 7.0.1 or earlier
    30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-45260 days apartGlobal ZCL command parser missing minimum-length validation in EmberZNet v9.0.2
    28Monitor
  • CVE-2026-471480 days apartGroups GetGroupMembership count/list-length mismatch in EmberZNet v9.0.2
    28Monitor
  • CVE-2026-471490 days apartDoor Lock GetUserType invalid table index in EmberZNet v9.0.2
    28Monitor
  • CVE-2026-471540 days apartSimple Metering GetProfileResponse interval-bounds bug in EmberZNet v9.0.2
    28Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
X

Weakness class (CWE)

CWE-125 · Out-of-bounds Read

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records