CVE-2018-0786

Microsoft .NET Framework 2.0 SP2, 3.0 SP2, 3.5, 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, .NET Core 1.0 and 2.0, and PowerShell Core 6.0.0 allow a security feature bypass vulnerability due to the way certificates are validated, aka ".NET Security Feature Bypass Vulnerability."

Published: 2018-01-09 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]

NVD Status：Modified，CVE State: published

View at NVD, CVE.org, EUVD

Threat Intelligence & Risk Assessment for CVE-2018-0786

EPSS CVSS CWE GHSA Affected OS Tracker

Conclusion & alert: CVE-2018-0786 is rated Moderate Risk (60.8/100): CVSS High severity, with medium exploitation likelihood (EPSS 3.69%). Mandatory action: Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2018-0786

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-21	3.76%	3.69%	-0.07%
2	2026-06-15	2.03%	3.76%	+1.73%
3	2026-01-03	—	2.03%	—

Full EPSS history (17 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-0786

CVSS metrics for this CVE.

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.5	3.0	HIGH	`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:N) Service keeps running; no real outage angle.	3.9	3.6	[email protected]
5.0	2.0	MEDIUM	`AV:N/AC:L/Au:N/C:N/I:P/A:N` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:L) Exploitation conditions are straightforward and predictable. Authentication (AU:N) No authentication is required. Confidentiality impact (C:N) No confidentiality impact. Integrity impact (I:P) Partial integrity impact. Availability impact (A:N) No availability impact.	10.0	2.9	[email protected]

Weakness enumeration for CVE-2018-0786

CWE-295 MITRE ↗

GitHub Security Advisory for CVE-2018-0786

GHSA-jc8g-xhw5-6x46 · Severity: high · Ecosystem: nuget — Improper Certificate Validation in Microsoft .NET Framework components

OS Trackers for CVE-2018-0786

vendor	priority	summary	link
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2018-0786

Affected software / configurations for CVE-2018-0786

Vendor	Product	Version	Raw CPE
microsoft	.net_core	1.0	cpe:2.3:a:microsoft:.net_core:1.0:::::::*
microsoft	.net_core	2.0	cpe:2.3:a:microsoft:.net_core:2.0:::::::*
microsoft	powershell_core	6.0	cpe:2.3:a:microsoft:powershell_core:6.0:::::::*
microsoft	.net_framework	2.0	cpe:2.3:a:microsoft:.net_framework:2.0:sp2::::::
microsoft	.net_framework	3.0	cpe:2.3:a:microsoft:.net_framework:3.0:sp2::::::
microsoft	.net_framework	3.5	cpe:2.3:a:microsoft:.net_framework:3.5:::::::*
microsoft	.net_framework	3.5.1	cpe:2.3:a:microsoft:.net_framework:3.5.1:::::::*
microsoft	.net_framework	4.5.2	cpe:2.3:a:microsoft:.net_framework:4.5.2:::::::*
microsoft	.net_framework	4.6	cpe:2.3:a:microsoft:.net_framework:4.6:::::::*
microsoft	.net_framework	4.6.1	cpe:2.3:a:microsoft:.net_framework:4.6.1:::::::*
microsoft	.net_framework	4.6.2	cpe:2.3:a:microsoft:.net_framework:4.6.2:::::::*
microsoft	.net_framework	4.7	cpe:2.3:a:microsoft:.net_framework:4.7:::::::*
microsoft	.net_framework	4.7.1	cpe:2.3:a:microsoft:.net_framework:4.7.1:::::::*

References for CVE-2018-0786

URL	Tags
http://www.securityfocus.com/bid/102380	Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1040152	Third Party Advisory VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0786	Patch Vendor Advisory

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