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PatchSiren cyber security CVE debrief

CVE-2026-86551 ZTE CVE debrief

The Z80Ultra (NX741J) product contains a vulnerability where non-privileged programs can retrieve the Wi-Fi MAC address by querying the read-only field factory_mac_address in the Settings.Secure database. This low-severity vulnerability has a CVSS score of 3.3. The CVE record was published on 2026-09-20T02:16:51.310Z and has not been modified since then.

Vendor
ZTE
Product
NX741J
CVSS
LOW 3.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-20
Original CVE updated
2026-09-20
Advisory published
2026-09-20
Advisory updated
2026-09-20

Who should care

Defenders managing Z80Ultra (NX741J) products should assess exposure and verify if non-privileged programs can access the Wi-Fi MAC address.

Why it matters

Defenders should assess exposure and verify if non-privileged programs can access the Wi-Fi MAC address on Z80Ultra (NX741J) products.

  • Verify potential exposure of Wi-Fi MAC addresses to non-privileged programs.
  • Assess and restrict access to the Settings.Secure database.

Technical summary

The Z80Ultra (NX741J) product contains a vulnerability where non-privileged programs can retrieve the Wi-Fi MAC address by querying the read-only field factory_mac_address in the Settings.Secure database. This vulnerability has a CVSS score of 3.3 and is considered low-severity.

Defensive priority

Defenders should assess exposure, particularly those managing Z80Ultra (NX741J) products, to verify if non-privileged programs can access the Wi-Fi MAC address.

Recommended defensive actions

  • Verify if Z80Ultra (NX741J) products are in use and assess exposure to non-privileged programs accessing the Wi-Fi MAC address.
  • Review and implement compensating controls to restrict access to the Settings.Secure database.
  • Monitor for potential exploitation attempts.

Evidence notes

The CVE record and NVD detail page provide information on the vulnerability. ZTE's PSIRT also provided a reference. Defenders should verify the vulnerability details and assess exposure of Z80Ultra (NX741J) products to non-privileged programs accessing the Wi-Fi MAC address. The information provided is based on available data and may not be exhaustive. Further verification is recommended.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-86551 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-86551

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-86551 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-86551

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.