ASP.NET Core Elevation of Privilege Vulnerability
Authentication bypass by assumed-immutable data in ASP.NET Core allows an authorized attacker to elevate privileges over a network.
- BDU:2026-12015
- EUVD-2026-44354
- GHSA-2p3q-h3hg-jcqq
- ALSA-2026:41893
- ALSA-2026:41894
- ALSA-2026:41895
- ALSA-2026:41896
- ALSA-2026:41897
- ALSA-2026:41898
- ALSA-2026:41899
- ALSA-2026:41900
- ALSA-2026:41901
- RHSA-2026:26638
- RHSA-2026:39952
- RHSA-2026:41893
- RHSA-2026:41894
- RHSA-2026:41895
- RHSA-2026:41896
- RHSA-2026:41897
- RHSA-2026:41898
- Published
- Jul 14, 2026
- Updated
- Sep 25, 2026
- EPSS
- 0.8% · 56th percentile
- CWE
- CWE-90
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Report tools
Action score
35
Monitor
Low priority for now.
- CVSS
- 35 / 40 · 8.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.8%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · microsoft
- 8.8
- NVD has not scored this yet; the score shown is the CNA’s.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| microsoft | .net | cpe:2.3:a:microsoft:.net |
| microsoft | windows | cpe:2.3:o:microsoft:windows |
| microsoft | visual studio 2022 | cpe:2.3:a:microsoft:visual_studio_2022 |
| microsoft | visual studio 2026 | cpe:2.3:a:microsoft:visual_studio_2026 |
| apple | macos | cpe:2.3:o:apple:macos |
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- microsoft .net8.0.0 and later · before 8.0.29
- microsoft .net9.0.0 and later · before 9.0.18
- microsoft .net10.0.0 and later · before 10.0.6
- microsoft visual studio 202217.12.0 and later · before 17.12.22
- microsoft visual studio 202217.14.0 and later · before 17.14.36
- microsoft visual studio 202618.7.0 and later · before 18.7.4
Versions reported by the vendor
Affected version ranges reported by the assigning authority (microsoft). Independent of NVD's CPE analysis and usually ahead of it.
Microsoft .NET 10.0
- 10.0.0 and later · before 10.0.10affected
Microsoft .NET 8.0
- 8.0.0 and later · before 8.0.29affected
Microsoft .NET 9.0
- 9.0.0 and later · before 9.0.18affected
Microsoft Microsoft Visual Studio 2022 version 17.12
- 17.12.0 and later · before 17.12.22affected
Microsoft Microsoft Visual Studio 2022 version 17.14
- 17.14.0 and later · before 17.14.36affected
Microsoft Microsoft Visual Studio 2026 version 18.7
- 18.0 and later · before 18.7.4affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:10 | aspnetcore-runtime-10.0 | before 10.0.10-1.el10_2 | 10.0.10-1.el10_2 |
| AlmaLinux:10 | aspnetcore-runtime-8.0 | before 8.0.29-1.el10_2 | 8.0.29-1.el10_2 |
| AlmaLinux:10 | aspnetcore-runtime-9.0 | before 9.0.18-1.el10_2 | 9.0.18-1.el10_2 |
| AlmaLinux:10 | aspnetcore-runtime-dbg-10.0 | before 10.0.10-1.el10_2 | 10.0.10-1.el10_2 |
| AlmaLinux:10 | aspnetcore-runtime-dbg-8.0 | before 8.0.29-1.el10_2 | 8.0.29-1.el10_2 |
| AlmaLinux:10 | aspnetcore-runtime-dbg-9.0 | before 9.0.18-1.el10_2 | 9.0.18-1.el10_2 |
| AlmaLinux:10 | aspnetcore-targeting-pack-10.0 | before 10.0.10-1.el10_2 | 10.0.10-1.el10_2 |
| AlmaLinux:10 | aspnetcore-targeting-pack-8.0 | before 8.0.29-1.el10_2 | 8.0.29-1.el10_2 |
| AlmaLinux:10 | aspnetcore-targeting-pack-9.0 | before 9.0.18-1.el10_2 | 9.0.18-1.el10_2 |
| AlmaLinux:10 | dotnet-apphost-pack-10.0 | before 10.0.10-1.el10_2 | 10.0.10-1.el10_2 |
| AlmaLinux:10 | dotnet-apphost-pack-8.0 | before 8.0.29-1.el10_2 | 8.0.29-1.el10_2 |
| AlmaLinux:10 | dotnet-apphost-pack-9.0 | before 9.0.18-1.el10_2 | 9.0.18-1.el10_2 |
| AlmaLinux:10 | dotnet-host | before 10.0.10-1.el10_2 | 10.0.10-1.el10_2 |
| AlmaLinux:10 | dotnet-hostfxr-10.0 | before 10.0.10-1.el10_2 | 10.0.10-1.el10_2 |
| AlmaLinux:10 | dotnet-hostfxr-8.0 | before 8.0.29-1.el10_2 | 8.0.29-1.el10_2 |
| AlmaLinux:10 | dotnet-hostfxr-9.0 | before 9.0.18-1.el10_2 | 9.0.18-1.el10_2 |
| AlmaLinux:10 | dotnet-runtime-10.0 | before 10.0.10-1.el10_2 | 10.0.10-1.el10_2 |
| AlmaLinux:10 | dotnet-runtime-8.0 | before 8.0.29-1.el10_2 | 8.0.29-1.el10_2 |
| AlmaLinux:10 | dotnet-runtime-9.0 | before 9.0.18-1.el10_2 | 9.0.18-1.el10_2 |
| AlmaLinux:10 | dotnet-runtime-dbg-10.0 | before 10.0.10-1.el10_2 | 10.0.10-1.el10_2 |
| AlmaLinux:10 | dotnet-runtime-dbg-8.0 | before 8.0.29-1.el10_2 | 8.0.29-1.el10_2 |
| AlmaLinux:10 | dotnet-runtime-dbg-9.0 | before 9.0.18-1.el10_2 | 9.0.18-1.el10_2 |
| AlmaLinux:10 | dotnet-sdk-10.0 | before 10.0.110-1.el10_2 | 10.0.110-1.el10_2 |
| AlmaLinux:10 | dotnet-sdk-10.0-source-built-artifacts | before 10.0.110-1.el10_2 | 10.0.110-1.el10_2 |
+96
Same product
microsoft: all recordsOther highest-scoring records for the same primary product.
- CVE-2023-38180.NET and Visual Studio Denial of Service VulnerabilityKEV64This week
- CVE-2023-38171Microsoft QUIC Denial of Service Vulnerability51Plan
- CVE-2021-26701.NET Core Remote Code Execution Vulnerability41Plan
- CVE-2024-43498.NET and Visual Studio Remote Code Execution Vulnerability40Plan
- CVE-2025-21176.NET, .NET Framework, and Visual Studio Remote Code Execution Vulnerability36Monitor
- CVE-2026-69439.NET and Visual Studio Elevation of Privilege Vulnerability35Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| .NET 10.0 installed on Linux | 10.0.10 · KB5104034 | Microsoft (MSRC) |
| .NET 10.0 installed on Mac OS | 10.0.10 · KB5104034 | Microsoft (MSRC) |
| .NET 8.0 installed on Linux | 8.0.29 · KB5104032 | Microsoft (MSRC) |
| .NET 8.0 installed on Mac OS | 8.0.29 · KB5104032 | Microsoft (MSRC) |
| .NET 8.0 installed on Windows | 8.0.29 · KB5104032 | Microsoft (MSRC) |
| .NET 9.0 installed on Linux | 9.0.18 · KB5104033 | Microsoft (MSRC) |
| .NET 9.0 installed on Mac OS | 9.0.18 · KB5104033 | Microsoft (MSRC) |
| .NET 9.0 installed on Windows | 9.0.18 · KB5104033 | Microsoft (MSRC) |
| Microsoft Visual Studio 2022 version 17.12 | 17.12.22 · Release Notes | Microsoft (MSRC) |
| Microsoft Visual Studio 2022 version 17.14 | 17.14.36 · Release Notes | Microsoft (MSRC) |
| Microsoft Visual Studio 2026 version 18.7 | 18.7.4 · Release Notes | Microsoft (MSRC) |
| almalinux:aspnetcore-runtime-8.0 | 8.0.29-1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:aspnetcore-runtime-dbg-8.0 | 8.0.29-1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:aspnetcore-targeting-pack-8.0 | 8.0.29-1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:dotnet-apphost-pack-8.0 | 8.0.29-1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:dotnet-hostfxr-8.0 | 8.0.29-1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:dotnet-runtime-8.0 | 8.0.29-1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:dotnet-runtime-dbg-8.0 | 8.0.29-1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:dotnet-sdk-8.0 | 8.0.129-1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:dotnet-sdk-8.0-source-built-artifacts | 8.0.129-1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:dotnet-sdk-dbg-8.0 | 8.0.129-1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:dotnet-targeting-pack-8.0 | 8.0.29-1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:dotnet-templates-8.0 | 8.0.129-1.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| NuGet:Microsoft.AspNetCore.Authentication.Negotiate | 10.0.10 | Package registry (OSV) |
| NuGet:Microsoft.AspNetCore.Authentication.Negotiate | 8.0.29 | Package registry (OSV) |
| NuGet:Microsoft.AspNetCore.Authentication.Negotiate | 9.0.18 | Package registry (OSV) |
| red hat:aspnetcore-runtime-10.0 | 0:10.0.9-1.hum1 · Red Hat:hummingbird:1 | Package registry (OSV) |
| red hat:aspnetcore-runtime-8.0 | 0:8.0.29-1.el10_2 · Red Hat:enterprise_linux:10.2 | Package registry (OSV) |
| red hat:aspnetcore-runtime-9.0 | 0:9.0.18-1.hum1 · Red Hat:hummingbird:1 | Package registry (OSV) |
| red hat:aspnetcore-runtime-dbg-8.0 | 0:8.0.29-1.el10_2 · Red Hat:enterprise_linux:10.2 | Package registry (OSV) |
+11
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
—
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
- CVE-2026-6980656 days apart.NET Elevation of Privilege Vulnerability28Monitor
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-90 · Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.