The story was penned by Bloomberg and claimed Vodafone spotted security flaws in software that could have given Huawei unauthorised access to Italian homes and businesses.

Huawei said there had been two security issues which were fixed in 2011 and 2012 and they were not backdoors.

In a statement, Vodafone backed Huawei : "The issues in Italy identified in the Bloomberg story were all resolved and date back to 2011 and 2012.

"The 'backdoor' that Bloomberg refers to is Telnet, which is a protocol that is commonly used by many vendors in the industry for performing diagnostic functions. It would not have been accessible from the internet.

"Bloomberg is incorrect in saying that this 'could have given Huawei unauthorised access to the carrier's fixed-line network in Italy'.

"In addition, we have no evidence of any unauthorised access. This was nothing more than a failure to remove a diagnostic function after development.

"The issues were identified by independent security testing, initiated by Vodafone as part of our routine security measures, and fixed at the time by Huawei.

"Software vulnerabilities are an industry-wide challenge. Like every ICT [information and communications technology] vendor, we have a well-established public notification and patching process, and when a vulnerability is identified, we work closely with our partners to take the appropriate corrective action."