Some Third-Party Ad Services Called Security Threat

When Internet providers hire third-party companies to serve up advertisements on unused Web pages, that creative attempt to make money can open major security vulnerabilities they can't control, a researcher has found. A hacker who breaks into the computer system of the company hired to display those ads can cause all kinds of mayhem, injecting code onto the pages you see or altering the pages to trick you into coughing up sensitive personal information.

Read the article: Mercury News