"Cyber security remains [a] top priority" for Huawei, the world's biggest manufacturer of telecom equipment, he said, while cautioning that the improvements would take time.
In a letter to Norman Lamb, chairman of the committee, Ryan Ding, president of Huawei's carrier business, said: "Enhancing our software engineering capabilities is like replacing components on a high-speed train in motion".
The report from the United Kingdom government's National Cyber Security Centre (NCSC) was published in July previous year, finding two low-priority national security findings and two advisory issues in its annual evaluation of the Huawei Cyber Security Evaluation Centre (HCSEC).
He said that while some countries - including New Zealand, Australia and the US - had "indeed taken measures to restrict Huawei business activities", some of the restrictions had been "exaggerated or even misinterpreted by the media".
It is a complicated process and will take at least three to five years to see tangible results.
A Huawei spokesman said: "We can not add to what is outlined in the letter, where we have explained our position in full to the House of Commons Committee; and we are continuing to work closely with the authorities in the United Kingdom". The two Chinese mobile giants have been accused by the U.S. government of posing national security risks.
Wariness and hope in S. Korea over second Trump-Kim summit
The announcement came after the top US envoy to North Korea wrapped up three days of talks with his counterpart in Pyongyang . He may surprise some but he won't surprise me, because I have gotten to know him & fully understand how capable he is.
Governments in Europe, Japan, and Australia are also considering or have ordered bans on Huawei equipment. The law mandates any organization and citizen to support and assist national intelligence in their investigations and to keep information related to such investigations. Allegedly, Huawei's 5G infrastructure equipment can come with backdoors, allowing the Chinese government to spy on communications of any country using Huawei's gear.
"Huawei is a closely watched company", he said.
British authorities stress they have never found any evidence of Chinese state espionage in reviews of Huawei equipment at a special company laboratory overseen by intelligence and industry officials.
'For us, it is a matter of security or nothing; there is no third option.
Germany's federal cybersecurity agency is investigating whether China's Huawei Technologies could be a security threat after warnings from other countries, the Funke group of newspapers reported on Friday, citing Economy Minister Peter Altmaier.