CVE-2009-0419: Microsoft XML Core Services

Medium severity, CVSS 5.0. EPSS: 15.3% chance of exploitation in the next 30 days.

Microsoft XML Core Services, as used in Microsoft Expression Web, Office, Internet Explorer 6 and 7, and other products, does not properly restrict access from web pages to Set-Cookie2 HTTP response headers, which allows remote attackers to obtain sensitive information from cookies via XMLHttpRequest calls, related to the HTTPOnly protection mechanism. NOTE: this issue reportedly exists because of an incomplete fix for CVE-2008-4033.

Affected products

• Microsoft XML Core Services: any version

Published 2009-02-04. Last modified 2026-06-16.