CVE-2018-8421

high-risk
Published 2018-09-13

A remote code execution vulnerability exists when Microsoft .NET Framework processes untrusted input, aka ".NET Framework Remote Code Execution Vulnerability." This affects Microsoft .NET Framework 4.6, Microsoft .NET Framework 3.5, Microsoft .NET Framework 4.7/4.7.1/4.7.2, Microsoft .NET Framework 3.0, Microsoft .NET Framework 3.5.1, Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2, Microsoft .NET Framework 4.5.2, Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.1/4.7.2, Microsoft .NET Framework 4.7.1/4.7.2, Microsoft .NET Framework 4.7.2, Microsoft .NET Framework 2.0.

Do I need to act?

!
55.0% chance of exploitation in next 30 days
EPSS score — higher than 45% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (11)

Affected Vendors

Microsoft

References (6)

Third Party Advisory http://www.securityfocus.com/bid/105222
Third Party Advisory http://www.securitytracker.com/id/1041636
Patch https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8421
Third Party Advisory http://www.securityfocus.com/bid/105222
Third Party Advisory http://www.securitytracker.com/id/1041636
Patch https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8421
66
/ 100
high-risk
Severity 32/34 · Critical
Exploitability 18/34 · Moderate
Exposure 16/34 · Moderate