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CVE-2018-8416

24
FAUCET Score

CVE-2018-8416 is a tampering vulnerability in .NET Core 2.1, allowing an attacker to modify specially crafted files. It has a CVSS score of 6.5 (Medium), indicating it can be exploited over a network with low complexity, leading to high integrity impact without requiring user interaction. While no public exploit code or active exploitation is reported, its EPSS score suggests a low but non-negligible probability of exploitation. Community discussion and media coverage are minimal, with only one article mentioning it as part of a broader patch Tuesday.

Impacted Technologies

VendorProductVersion(s)CPE
2.1CPE matchmatch criteria
cpe:2.3:a:microsoft:asp.net_core:2.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
7.26%
Probability of exploitation in next 30 days
EPSS Percentile
93.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0726 is in the 98th percentile among its peer group of 21,974 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (6)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: .NET Core 2.1
View patch
microsoftpatch availablevia msrc
Product: PowerShell Core 6.1
View patch
microsoftpatch availablevia msrc
Product: PowerShell Core 6.2
View patch
nugetpatch availablevia ghsa
Product: Microsoft.NETCore.AppFixed in: 2.1.7
redhatpatch availablevia redhat_api
Product: .NET Core on Red Hat Enterprise LinuxFixed in: rh-dotnet21-dotnet-0:2.1.500-5.el7
View patch

Vendor Advisories (3)

nugetGHSA-5633-f33j-c6f7medium

Tampering vulnerability in .NET Core

May 13, 2022
microsoft2018-Nov/CVE-2018-8416Moderate

.NET Core Tampering Vulnerability

Nov 13, 2018
redhatCVE-2018-8416Moderate

Core: Arbitrary file and directory creation

Nov 13, 2018

References

access.redhat.com / errata/RHSA-2018:3676
Third Party Advisory
portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2018-8416
PatchVendor Advisory
securityfocus.com / bid/105798
Third Party AdvisoryVDB Entry
securitytracker.com / id/1042128
Third Party AdvisoryVDB Entry