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Vulnerability record · CVE-2017-0248 · published 12 May 2017

CVE-2017-0248: Microsoft .net framework improper certificate validation vulnerability

Microsoft · .Net Framework

Microsoft .NET Framework 2.0, 3.5, 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2 and 4.7 allow an attacker to bypass Enhanced Security Usage taggings when they present a certificate that is invalid for a specific use, aka ".NET Security Feature Bypass Vulnerability."

7.5 CVSS 3.0 High EPSS 5.5% · top 7.5% CWE-295 · Improper certificate validation
7.5CVSS 3.0 base score, v2 5.0
5.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

Microsoft .NET Framework 2.0, 3.5, 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2 and 4.7 allow an attacker to bypass Enhanced Security Usage taggings when they present a certificate that is invalid for a specific use, aka ".NET Security Feature Bypass Vulnerability."

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/98117 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1038458
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0248 PatchVendor Advisory
http://www.securityfocus.com/bid/98117 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1038458
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0248 PatchVendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2017-0248), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.