CVE-2007-5277: Microsoft Internet Explorer

Medium severity, CVSS 4.3. EPSS: 9.7% chance of exploitation in the next 30 days.

Microsoft Internet Explorer 6 drops DNS pins based on failed connections to irrelevant TCP ports, which makes it easier for remote attackers to conduct DNS rebinding attacks, as demonstrated by a port 81 URL in an IMG SRC, when the DNS pin had been established for a session on port 80, a different issue than CVE-2006-4560.

Affected products

• Microsoft Internet Explorer: version 6.0 only

Published 2007-10-08. Last modified 2026-06-16.