Entercom has confirmed it suffered a disruption to its IT systems over the weekend and says the issues were largely resolved by Monday morning. What has been reported as a cyber-attack came just three months after a major breach in September that cost the company millions of dollars in costs, lost revenues and new security systems.

Entercom isn’t commenting on the specifics of the weekend outage and whether it involved a cyber-attack into encrypted servers. According to various reports, the company had connectivity issues that affected email, access to files and content for the company’s digital platforms.

The Sunday security breach is believed to have been smaller in scale than a major attack in September, which brought down Entercom’s companywide email system and caused problems with a host of other systems the company relies on to conduct business, including its AudioVault automation system, music scheduling, computer networks, printers, billing and other internal digital systems.

During Entercom’s third quarter results call, CFO Richard Schmaeling said the September breach incurred $1 million in costs and $400,000 in lost revenues. To safeguard the company from future attacks, the company, increased its IT CapEx investment by about $2 million “as we rapidly further fortify our defenses,” Schmaeling said then.