How severe is CVE-2005-1665?

CVE-2005-1665 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2005-1665 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 40% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2005-1665?

CVE-2005-1665 primarily affects Microsoft Asp.net. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2005-1665?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2005-1665 published?

CVE-2005-1665 was published on 2005-05-18 and last updated on 2026-06-16.

CVE-2005-1665

CVE-2005-1665 is a medium-severity vulnerability in Microsoft Asp.net with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 40% places it in the 98th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 40% (98th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Asp.net
Published: 2005-05-18
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is CVE-2005-1665?: 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.
How severe is CVE-2005-1665?: CVE-2005-1665 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2005-1665 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 40% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2005-1665?: CVE-2005-1665 primarily affects Microsoft Asp.net. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2005-1665?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2005-1665 published?: CVE-2005-1665 was published on 2005-05-18 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:microsoft:asp.net:1.0:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:asp.net:1.1:*:*:*:*:*:*:*

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