ASP.NET: Incorrect certificate validation can allow attackers to bypass security checks
Published Jan 10, 2018
7.5
HIGHCVSS 3.0
EPSS 3.69%
Description
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."
Affected products
-
- Version 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, PowerShell Core 6.0.0StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Microsoft Corporation | n/a | n/a |
|
Configuration 1
Configuration 2
- 2.0
- 3.0
Running on/with
- n/a
Configuration 3
- 3.5
Running on/with
- n/a
- 1511
- 1607
- 1703
- 1709
- n/a
- n/a
- r2
- n/a
Configuration 4
- 3.5.1
Running on/with
- n/a
- r2
- r2
Configuration 5
- 4.5.2
Running on/with
- n/a
- n/a
- n/a
- n/a
- r2
- n/a
- r2
Configuration 6
- 4.6
Running on/with
- n/a
- n/a
Configuration 7
- 4.6.1
Running on/with
- 1511
Configuration 8
- 4.6.2
- 4.7
Running on/with
- 1607
- n/a
Configuration 9
- 4.6
- 4.6.1
- 4.6.2
- 4.7
Running on/with
- n/a
- n/a
- n/a
- r2
- n/a
- r2
Configuration 10
- 4.7
Running on/with
- 1703
Configuration 11
- 4.7.1
Running on/with
- 1709
No data.
.NET Core 1.0 on Red Hat Enterprise Linux
rh-dotnetcore10-dotnetcore
Not affected
.NET Core 1.1 on Red Hat Enterprise Linux
rh-dotnetcore11-dotnetcore
Not affected
.NET Core 2.0 on Red Hat Enterprise Linux
rh-dotnet20-dotnet
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| .NET Core 1.0 on Red Hat Enterprise Linux | rh-dotnetcore10-dotnetcore | Not affected | n/a |
| .NET Core 1.1 on Red Hat Enterprise Linux | rh-dotnetcore11-dotnetcore | Not affected | n/a |
| .NET Core 2.0 on Red Hat Enterprise Linux | rh-dotnet20-dotnet | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
AV:N/AC:L/Au:N/C:N/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (17 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.69% (0.03687) | 89.34th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.76% (0.03757) | 88.45th | v5 (v2026.06.15) |
| Nov 18, 2025 | 2.03% (0.02026) | 82.33th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.55% (0.00554) | 66.12th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.29% (0.00286) | 69.61th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.29% (0.00286) | 67.87th | v3 (v2023.03.01) |
| Jul 12, 2023 | 0.29% (0.00286) | 64.41th | v3 (v2023.03.01) |
| Jun 2, 2023 | 0.27% (0.00271) | 63.10th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.35% (0.00352) | 67.45th | v3 (v2023.03.01) |
| Mar 6, 2023 | 6.42% (0.06416) | 91.03th | v2 (v2022.01.01) |
| May 2, 2022 | 6.42% (0.06416) | 90.20th | v2 (v2022.01.01) |
| Apr 1, 2022 | 5.85% (0.05853) | 89.57th | v2 (v2022.01.01) |
| Feb 4, 2022 | 5.85% (0.05853) | 77.42th | v2 (v2022.01.01) |
| Feb 3, 2022 | 8.76% (0.08756) | 86.41th | v1 |
| Jan 6, 2022 | 8.76% (0.08756) | 86.25th | v1 |
| Sep 1, 2021 | 8.76% (0.08756) | 93.70th | v1 |
| Apr 14, 2021 | 8.76% (0.08756) | 0.00th | v1 |
References (11)
- http://www.securityfocus.com/bid/102380 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1040152 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2018-0786 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1533725 Issue Tracking
- https://github.com/advisories/GHSA-jc8g-xhw5-6x46 Advisory
- https://github.com/dotnet/announcements/issues/51
- https://github.com/github/advisory-database/issues/302
- https://nvd.nist.gov/vuln/detail/CVE-2018-0786
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0786 x_refsource_CONFIRMPatchVendor Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-0786
- https://www.nuget.org/packages/System.ServiceModel.Duplex#versions-body-tab
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/102380 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1040152 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/security/cve/CVE-2018-0786 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1533725 | Issue Tracking | |
| https://github.com/advisories/GHSA-jc8g-xhw5-6x46 | Advisory | |
| https://github.com/dotnet/announcements/issues/51 | ||
| https://github.com/github/advisory-database/issues/302 | ||
| https://nvd.nist.gov/vuln/detail/CVE-2018-0786 | ||
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0786 | x_refsource_CONFIRMPatchVendor Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2018-0786 | ||
| https://www.nuget.org/packages/System.ServiceModel.Duplex#versions-body-tab |
Change history (0)
No recorded changes yet.