Network managers have slammed BT for taking too long to respond to the security gaffe caused by its publication of a database of private network dial-up numbers.
Richard Hagart, IT manager for a Glasgow-based car sales firm, said he had been attempting for the last nine months to warn BT of the security issues thrown up by the list.
"I spoke to three or four different people, but no one seemed interested in security issues," he said.
"When I did finally get in touch with someone who understood my concerns, they didn't think it was a security risk."
Hagart said when he first noticed the page he immediately recognised it as a "massive security risk".
He welcomed BT's decision to block full access to the database, but said that action may have been taken to late.
"It was a ready-made resource for hackers for almost a year," he said. "You had a few thousand numbers that you could guarantee had a modem on the other end. It would be easy for a hacker to have a go at any number on that list," he said.
Earlier this week a BT spokesman denied that BT had received a significant number of complaints about the publication of its 'ISP exclusion list', which contained ex-directory dial-up numbers for private networks.
Why does Facebook store "my entire call history with my partner's mum", asks developer who requested his Facebook data
Facebook database included text-message metadata - despite not using Facebook Messenger for SMS
Before Ocado could start selling the technology it had developed to other retailers, it had to tear down and rebuild its own monolithic architecture
Successful attack could result in harm to patients and financial loss, warns NHS governing body
Guccifer 2.0 claimed to be a lone Romanian hacker - until a schoolboy error gave him, her or them away