How severe is CVE-2018-8260?

CVE-2018-8260 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-8260 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 15% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-8260?

CVE-2018-8260 affects Microsoft .net Framework. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-8260?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-8260 published?

CVE-2018-8260 was published on 2018-07-11 and last updated on 2026-06-17.

CVE-2018-8260

CVE-2018-8260 is a high-severity vulnerability in Microsoft .net Framework with a CVSS 3.x base score of 8.8. Its EPSS exploit-prediction score of 15% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 15% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Microsoft .net Framework
Published: 2018-07-11
Last modified: 2026-06-17

Description

A Remote Code Execution vulnerability exists in .NET software when the software fails to check the source markup of a file, aka ".NET Framework Remote Code Execution Vulnerability." This affects .NET Framework 4.7.2, Microsoft .NET Framework 4.7.2.

Frequently asked questions

What is CVE-2018-8260?: A Remote Code Execution vulnerability exists in .NET software when the software fails to check the source markup of a file, aka ".NET Framework Remote Code Execution Vulnerability." This affects .NET Framework 4.7.2, Microsoft .NET Framework 4.7.2.
How severe is CVE-2018-8260?: CVE-2018-8260 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-8260 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 15% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-8260?: CVE-2018-8260 affects Microsoft .net Framework. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-8260?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-8260 published?: CVE-2018-8260 was published on 2018-07-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:microsoft:.net_framework:4.7.2:*:*:*:*:*:*:*

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