CVE-2005-1665

Asp.Net vulnerability

CVSS

5.0

EPSS

40.3%

EPSS pct

98th

Exploited

No known

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 vendor

Microsoft

Affected product

Asp.Net

CVSS vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Published

2005-05-18

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no authentication. Successful exploitation leads to partial impact to availability.

Its EPSS score of 40.3% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 98% of all scored CVEs.

Check your external exposure to CVE-2005-1665

Confirm whether Microsoft Asp.Net is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2005-1665.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2005-1665

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2005-1665 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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Are you exposed to CVE-2005-1665?

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