CVE-2007-2291: CRLF injection vulnerability in the Digest Authentication support for Microsoft Internet Explorer 7.0.5730....

Security readout for executives and security teams

This old browser flaw concerns Internet Explorer 7.0.5730.11 handling of Digest Authentication. A crafted username containing a line break could make authentication traffic malformed in a way associated with HTTP response splitting. The provided sources do not include a vendor patch statement, CVSS score, or evidence of current exploitation. Likely exposure is limited to environments that still allow legacy Internet Explorer 7.0.5730.11 clients to authenticate with Digest Authentication. Modern supported browsers are not identified as affected in the supplied bundle. Asset discovery should focus on legacy desktops, kiosk systems, embedded Windows images, and unusual compatibility environments. Low immediate urgency unless the organization still runs legacy Internet Explorer 7 in production or kiosk environments. Prioritize as a legacy technology risk: confirm absence, remove exceptions, and document any remaining business dependency. Mitigation focus: Inventory any remaining Internet Explorer 7.0.5730.11 usage.; Retire or isolate unsupported legacy browser clients where found.; Check Microsoft or vendor guidance for fixed versions or supported replacements..

Prepared

Jun 29, 2026, 05:56 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.