Via Slashdot comes a CNN article which states the South Korean MSN website (located at www.msn.co.kr) was compromised earlier this week, possibly allowing users' login information to be stolen. As with some many other Windows security problems, the culprit seems to have been an unpatched operating system:
The Korean site, unlike U.S. versions, was operated by another company, which Microsoft did not identify. Microsoft's own experts and Korean police were investigating, but Microsoft believes the computers were vulnerable because operators failed to apply necessary software patches, said Sohn, an MSN director.
Microsoft said it was trying to decide whether to issue a broad public warning to recent visitors of the Korean site as it examines its own records to attempt to trace anyone who might have been victimized.