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NVD / CVE Program· CNA microsoft

CVE-2026-26130: ASP.NET Core Denial of Service Vulnerability

HighCVSS 7.5 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 3.1% (FIRST EPSS); higher than 88.2% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: ASP.NET Core 10.0 10.0.4; ASP.NET Core 8.0 8.0.25; ASP.NET Core 9.0 9.0.14.

Low priority for now. Upgrade to ASP.NET Core 10.0 10.0.4; ASP.NET Core 8.0 8.0.25; ASP.NET Core 9.0 9.0.14 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.

Published
Mar 10, 2026
Updated
Jul 15, 2026
EPSS
3.1% · 88th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 3.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · microsoft
7.5
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-26130

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
microsoftasp.net core

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 ASP.NET Core 10.0

    • 10.0 and later · before 10.0.4affected

  • Microsoft ASP.NET Core 8.0

    • 8.0 and later · before 8.0.25affected

  • Microsoft ASP.NET Core 9.0

    • 9.0 and later · before 9.0.14affected

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • microsoft asp.net core8.0.0 and later · before 8.0.25
  • microsoft asp.net core9.0.0 and later · before 9.0.14
  • microsoft asp.net core10.0.0 and later · before 10.0.4

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10aspnetcore-runtime-10.0before 10.0.4-1.el10_110.0.4-1.el10_1
AlmaLinux:10aspnetcore-runtime-8.0before 8.0.25-1.el10_18.0.25-1.el10_1
AlmaLinux:10aspnetcore-runtime-9.0before 9.0.14-1.el10_19.0.14-1.el10_1
AlmaLinux:10aspnetcore-runtime-dbg-10.0before 10.0.4-1.el10_110.0.4-1.el10_1
AlmaLinux:10aspnetcore-runtime-dbg-8.0before 8.0.25-1.el10_18.0.25-1.el10_1
AlmaLinux:10aspnetcore-runtime-dbg-9.0before 9.0.14-1.el10_19.0.14-1.el10_1
AlmaLinux:10aspnetcore-targeting-pack-10.0before 10.0.4-1.el10_110.0.4-1.el10_1
AlmaLinux:10aspnetcore-targeting-pack-8.0before 8.0.25-1.el10_18.0.25-1.el10_1
AlmaLinux:10aspnetcore-targeting-pack-9.0before 9.0.14-1.el10_19.0.14-1.el10_1
AlmaLinux:10dotnet-apphost-pack-10.0before 10.0.4-1.el10_110.0.4-1.el10_1
AlmaLinux:10dotnet-apphost-pack-8.0before 8.0.25-1.el10_18.0.25-1.el10_1
AlmaLinux:10dotnet-apphost-pack-9.0before 9.0.14-1.el10_19.0.14-1.el10_1
AlmaLinux:10dotnet-hostbefore 10.0.4-1.el10_110.0.4-1.el10_1
AlmaLinux:10dotnet-hostfxr-10.0before 10.0.4-1.el10_110.0.4-1.el10_1
AlmaLinux:10dotnet-hostfxr-8.0before 8.0.25-1.el10_18.0.25-1.el10_1
AlmaLinux:10dotnet-hostfxr-9.0before 9.0.14-1.el10_19.0.14-1.el10_1
AlmaLinux:10dotnet-runtime-10.0before 10.0.4-1.el10_110.0.4-1.el10_1
AlmaLinux:10dotnet-runtime-8.0before 8.0.25-1.el10_18.0.25-1.el10_1
AlmaLinux:10dotnet-runtime-9.0before 9.0.14-1.el10_19.0.14-1.el10_1
AlmaLinux:10dotnet-runtime-dbg-10.0before 10.0.4-1.el10_110.0.4-1.el10_1
AlmaLinux:10dotnet-runtime-dbg-8.0before 8.0.25-1.el10_18.0.25-1.el10_1
AlmaLinux:10dotnet-runtime-dbg-9.0before 9.0.14-1.el10_19.0.14-1.el10_1
AlmaLinux:10dotnet-sdk-10.0before 10.0.104-1.el10_110.0.104-1.el10_1
AlmaLinux:10dotnet-sdk-10.0-source-built-artifactsbefore 10.0.104-1.el10_110.0.104-1.el10_1

+96

Same product

microsoft: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-55315ASP.NET Security Feature Bypass Vulnerability
    59Plan
  • CVE-2020-0603A remote code execution vulnerability exists in ASP.NET Core software when the software fails to handle objects in memory.An attacker who…
    42Plan
  • CVE-2026-40372ASP.NET Core Elevation of Privilege Vulnerability
    39Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2025-24070Mar 11, 2025 · ASP.NET Core and Visual Studio Elevation of Privilege Vulnerability
    28Monitor
  • ← EarlierCVE-2025-26682Apr 8, 2025 · ASP.NET Core and Visual Studio Denial of Service Vulnerability
    31Monitor
  • Later →CVE-2026-45591Jun 9, 2026 · ASP.NET Core Denial of Service Vulnerability
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
ASP.NET Core 10.010.0.4 · KB5081276Microsoft (MSRC)
ASP.NET Core 8.08.0.25 · KB5081277Microsoft (MSRC)
ASP.NET Core 9.09.0.14 · KB5081278Microsoft (MSRC)
almalinux:aspnetcore-runtime-9.09.0.14-1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:aspnetcore-runtime-dbg-9.09.0.14-1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:aspnetcore-targeting-pack-9.09.0.14-1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:dotnet-apphost-pack-9.09.0.14-1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:dotnet-hostfxr-9.09.0.14-1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:dotnet-runtime-9.09.0.14-1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:dotnet-runtime-dbg-9.09.0.14-1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:dotnet-sdk-9.09.0.115-1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:dotnet-sdk-9.0-source-built-artifacts9.0.115-1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:dotnet-sdk-aot-9.09.0.115-1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:dotnet-sdk-dbg-9.09.0.115-1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:dotnet-targeting-pack-9.09.0.14-1.el8_10 · AlmaLinux:8Package registry (OSV)
alpine:dotnet10-runtime10.0.4-r0 · Alpine:v3.23Package registry (OSV)
alpine:dotnet8-runtime8.0.25-r0 · Alpine:v3.20Package registry (OSV)
alpine:dotnet9-runtime9.0.14-r0 · Alpine:v3.21Package registry (OSV)
NuGet:Microsoft.AspNetCore.App.Runtime.linux-arm10.0.4Package registry (OSV)
NuGet:Microsoft.AspNetCore.App.Runtime.linux-arm8.0.25Package registry (OSV)
NuGet:Microsoft.AspNetCore.App.Runtime.linux-arm9.0.14Package registry (OSV)
NuGet:Microsoft.AspNetCore.App.Runtime.linux-arm6410.0.4Package registry (OSV)
NuGet:Microsoft.AspNetCore.App.Runtime.linux-arm648.0.25Package registry (OSV)
NuGet:Microsoft.AspNetCore.App.Runtime.linux-arm649.0.14Package registry (OSV)
NuGet:Microsoft.AspNetCore.App.Runtime.linux-musl-arm10.0.4Package registry (OSV)
NuGet:Microsoft.AspNetCore.App.Runtime.linux-musl-arm8.0.25Package registry (OSV)
NuGet:Microsoft.AspNetCore.App.Runtime.linux-musl-arm9.0.14Package registry (OSV)
NuGet:Microsoft.AspNetCore.App.Runtime.linux-musl-arm6410.0.4Package registry (OSV)
NuGet:Microsoft.AspNetCore.App.Runtime.linux-musl-arm648.0.25Package registry (OSV)
NuGet:Microsoft.AspNetCore.App.Runtime.linux-musl-arm649.0.14Package registry (OSV)

+39

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.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2025-26682336 days apartASP.NET Core and Visual Studio Denial of Service Vulnerability
    31Monitor

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-770 · Allocation of Resources Without Limits or Throttling

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.

References

Show all references (17 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records