Guangzhou Yuhong Technology Co., Ltd. — A4:89:7E (MA-L)

Guangzhou Yuhong Technology Co., Ltd. holds the IEEE MA-L block A4:89:7E, registered to a Tianhe District address in Guangzhou, Guangdong. The company is a manufacturer of fibre-optic access customer-premises equipment — GPON and EPON Optical Network Units (ONUs), single- and multi-port gateways, and Wi-Fi/VoIP-equipped ONUs — sold primarily to ISPs and network operators rather than at retail. A device presenting a globally-administered A4:89:7E MAC on an access network is therefore most plausibly an ISP-deployed fibre ONU/gateway. No vendor-specific CVEs, threat-intelligence reports, or botnet attributions naming Yuhong were found in open sources; that absence is honest rather than reassuring, because the broader device class it occupies — generic GPON/EPON ONU CPE — is a well-documented target. Mirai, Satori, and Muhstik variants have for years exploited GPON-router flaws CVE-2018-10561 (authentication bypass) and CVE-2018-10562 (command injection) across many small Chinese ONU OEMs whose ISP-flashed firmware is rarely patched. Treat Yuhong's hardware as sitting in that same exposure category at the class level, while noting no device of theirs is explicitly named in any advisory we could find. Note also that IEEE publishes no registration date for MA-L assignments, so no first-party registration date exists for this prefix.

IEEE assignment

A4:89:7E → Guangzhou Yuhong Technology Co.,Ltd. [Confirmed] — IEEE the IEEE MA-L registry (MA-L registry; local the IEEE MA-L registry line 550)

Registry / block size

MA-L (24-bit OUI; ~16.7M addresses) [Confirmed] — IEEE the IEEE MA-L registry. Single match; not present in MA-M (the IEEE MA-M registry) or MA-S (the IEEE MA-S registry).

Registered address

Room 402, No. 11 Software Road, Tianhe District, Guangzhou, Guangdong, CN 510640 [Confirmed] — IEEE the IEEE MA-L registry, corroborated by HKTDC supplier listing

Country

CN [Confirmed] — IEEE the IEEE MA-L registry

Registration date

Unknown — IEEE publishes NO assignment/registration date for OUI/MAC prefixes (the IEEE MA-L registry columns are only Registry, Assignment, Organization Name, Organization Address); any third-party "date registered" is a database artifact, not an IEEE fact.

[Confirmed — null is correct] — IEEE the IEEE MA-L registry schema

Company status

active [Likely] — single-source supplier directory; no corporate registry confirmation found — HKTDC supplier store

Device types

GPON Terminal, ONU (Optical Network Unit), EPON ONU, single- and multi-port GPON/EPON ONUs, ONU GPON Wi-Fi, gateway devices (fibre-access CPE, some with Wi-Fi and VoIP/POTS ports) [Confirmed] — HKTDC product listing

Industry

fibre-optic access network equipment (GPON/EPON CPE for ISPs)

Certifications

ISO 9001 (issuer Beijing East Allreach Certification Center Co., Ltd., valid 2024-01-09 to 2027-01-08) [Confirmed] — HKTDC supplier store

Website

yuhong-tech.com appears to be a component-distributor/BOM-sourcing site, not the ONU manufacturer's own domain — treat as unverified; the HKTDC supplier listing is the stronger primary source. LinkedIn page exists under the company name. [Likely / partly Unknown] — yuhong-tech.com, linkedin.com

Security context

No CVEs, threat-intel reports, or botnet activity attributable specifically to Guangzhou Yuhong devices found in open sources. Class-level risk applies: generic GPON/EPON ONU CPE is targeted by Mirai/Satori/Muhstik via CVE-2018-10561 (auth bypass) and CVE-2018-10562 (command injection); ISP-deployed firmware on small OEM ONUs is rarely patched. Whether Yuhong-branded devices are explicitly named in any advisory: Unknown. [Likely — class-level; vendor-specific Unknown] — threatdown.com, securityaffairs.com, broadcom.com attack-signature DB

Analyst note

A globally-administered A4:89:7E MAC most plausibly identifies an ISP-distributed fibre ONU/gateway. Inventory and access-control decisions should account for the absence of vendor-specific patch/advisory visibility and the class-level GPON CPE exposure profile.