CVE-2005-1665: Microsoft ASP.NET

Medium severity, CVSS 5.0. EPSS: 40.3% chance of exploitation in the next 30 days.

The __VIEWSTATE functionality in Microsoft ASP.NET 1.x, when not cryptographically signed, allows remote attackers to cause a denial of service (CPU consumption) via deeply nested markup.

Affected products

• Microsoft ASP.NET: version 1.0 only; version 1.1 only

Published 2005-05-18. Last modified 2026-06-16.