Is the aforementioned hadith weak?

The Hadith, "احتجبا منه" (veil yourselves from him), narrated by Umm Salama and Maymunah, is a Hasan Sahih (good and authentic) Hadith. It was narrated by Al-Tirmidhi, Ahmad, Abu Dawud, Al-Bayhaqi, Al-Nasa'i, Ibn Hibban, and others. It revolves around Umm Salama's question to the Prophet, peace and blessings be upon him, regarding veiling from Ibn Umm Maktum, who was blind. He replied, "Are you two also blind? Do you not see him?" Some scholars deemed the Hadith weak due to the unknown status of Nabhân, the mawla of Umm Salama, while others authenticated it due to the multiplicity of its chains of narration.