The issue in Huawei’s equipment was initially withheld from the Chinese company and not reported due to security concerns.
Source: GCHQ discovered ‘nationally significant’ vulnerability in Huawei equipment
TL;DR: characterized as bug, likely accidental, not malicious.
“They stressed the NCSC’s conclusion that the defects were not believed to be a result of malicious interference from the Chinese state, and that the UK’s networks are not more vulnerable than last year.”
