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NVD / CVE Program· CNA microsoft

CVE-2026-58280: .NET Denial of Service Vulnerability

Noroxi assessment

Priority: Monitor (action score 30/100)

  • 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: 1.2% (FIRST EPSS); higher than 69.3% 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.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: .NET 10.0 runtime installed on Linux 10.0.13; .NET 10.0 runtime installed on Mac OS 10.0.13; .NET 10.0 runtime installed on Windows 10.0.13.

Low priority for now. Upgrade to .NET 10.0 runtime installed on Linux 10.0.13; .NET 10.0 runtime installed on Mac OS 10.0.13; .NET 10.0 runtime installed on Windows 10.0.13 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

Uncontrolled recursion in .NET allows an unauthorized attacker to deny service over a network.

HighCVSS 7.5 · v3.1—No exploit Fix available
Published
Oct 13, 2026
Updated
Oct 30, 2026
EPSS
1.2% · 69th percentile

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.2%

CISA SSVC decision

Exploitation
none
Automatable
yes
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-2026-58280

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.

—

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 runtime

    • 10.0.0 and later · before 10.0.13affected

  • Microsoft .NET 11.0 runtime

    • 11.0.0 and later · before 11.0.0-rc.2affected

  • Microsoft .NET 8.0 runtime

    • 8.0.0 and later · before 8.0.32affected

  • Microsoft .NET 9.0 runtime

    • 9.0.0 and later · before 9.0.21affected

  • Microsoft Microsoft .NET Framework 3.5

    • 3.5.0 and later · before 2.0.50727.9188 AND 3.0.30729.9171affected

  • Microsoft Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2

    • 3.0.0.0 and later · before 2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0affected

  • Microsoft Microsoft .NET Framework 3.5 AND 4.7.2

    • 4.7.0 and later · before 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0affected

  • Microsoft Microsoft .NET Framework 3.5 AND 4.8

    • 4.8.0 and later · before 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0affected

  • Microsoft Microsoft .NET Framework 3.5 AND 4.8.1

    • 4.8.1 and later · before 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0affected

  • Microsoft Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2

    • 4.7.0 and later · before 4.7.4150.0affected

  • Microsoft Microsoft .NET Framework 4.8

    • 4.8.0 and later · before 4.8.4811.0affected

  • Microsoft Microsoft .NET Framework 4.8.1

    • 4.8.0.0 and later · before 4.8.9363.0affected

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:10aspnetcore-runtime-10.0before 10.0.13-1.el10_210.0.13-1.el10_2
AlmaLinux:10aspnetcore-runtime-8.0before 8.0.32-1.el10_28.0.32-1.el10_2
AlmaLinux:10aspnetcore-runtime-9.0before 9.0.21-1.el10_29.0.21-1.el10_2
AlmaLinux:10aspnetcore-runtime-dbg-10.0before 10.0.13-1.el10_210.0.13-1.el10_2
AlmaLinux:10aspnetcore-runtime-dbg-8.0before 8.0.32-1.el10_28.0.32-1.el10_2
AlmaLinux:10aspnetcore-runtime-dbg-9.0before 9.0.21-1.el10_29.0.21-1.el10_2
AlmaLinux:10aspnetcore-targeting-pack-10.0before 10.0.13-1.el10_210.0.13-1.el10_2
AlmaLinux:10aspnetcore-targeting-pack-8.0before 8.0.32-1.el10_28.0.32-1.el10_2
AlmaLinux:10aspnetcore-targeting-pack-9.0before 9.0.21-1.el10_29.0.21-1.el10_2
AlmaLinux:10dotnet-apphost-pack-10.0before 10.0.13-1.el10_210.0.13-1.el10_2
AlmaLinux:10dotnet-apphost-pack-8.0before 8.0.32-1.el10_28.0.32-1.el10_2
AlmaLinux:10dotnet-apphost-pack-9.0before 9.0.21-1.el10_29.0.21-1.el10_2
AlmaLinux:10dotnet-hostbefore 10.0.13-1.el10_210.0.13-1.el10_2
AlmaLinux:10dotnet-hostfxr-10.0before 10.0.13-1.el10_210.0.13-1.el10_2
AlmaLinux:10dotnet-hostfxr-8.0before 8.0.32-1.el10_28.0.32-1.el10_2
AlmaLinux:10dotnet-hostfxr-9.0before 9.0.21-1.el10_29.0.21-1.el10_2
AlmaLinux:10dotnet-runtime-10.0before 10.0.13-1.el10_210.0.13-1.el10_2
AlmaLinux:10dotnet-runtime-8.0before 8.0.32-1.el10_28.0.32-1.el10_2
AlmaLinux:10dotnet-runtime-9.0before 9.0.21-1.el10_29.0.21-1.el10_2
AlmaLinux:10dotnet-runtime-dbg-10.0before 10.0.13-1.el10_210.0.13-1.el10_2
AlmaLinux:10dotnet-runtime-dbg-8.0before 8.0.32-1.el10_28.0.32-1.el10_2
AlmaLinux:10dotnet-runtime-dbg-9.0before 9.0.21-1.el10_29.0.21-1.el10_2
AlmaLinux:10dotnet-sdk-10.0before 10.0.113-1.el10_210.0.113-1.el10_2
AlmaLinux:10dotnet-sdk-10.0-source-built-artifactsbefore 10.0.113-1.el10_210.0.113-1.el10_2

+96

Same product

microsoft: all records

Other highest-scoring records for the same primary product.

Published before and after this one in the same product

  • ← EarlierCVE-2026-69522Sep 8, 2026 · .NET and Visual Studio Remote Code Execution Vulnerability
    35Monitor
  • Later →CVE-2026-66822Oct 13, 2026 · .NET Information Disclosure Vulnerability
    23Monitor
  • Later →CVE-2026-69651Oct 13, 2026 · .NET Denial of Service Vulnerability
    30Monitor

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
.NET 10.0 runtime installed on Linux10.0.13 · KB5130036Microsoft (MSRC)
.NET 10.0 runtime installed on Mac OS10.0.13 · KB5130036Microsoft (MSRC)
.NET 10.0 runtime installed on Windows10.0.13 · KB5130036Microsoft (MSRC)
.NET 11.0 runtime installed on Linux11.0.0-rc.2 · Release NotesMicrosoft (MSRC)
.NET 11.0 runtime installed on Mac OS11.0.0-rc.2 · Release NotesMicrosoft (MSRC)
.NET 11.0 runtime installed on Windows11.0.0-rc.2 · Release NotesMicrosoft (MSRC)
.NET 8.0 runtime installed on Linux8.0.32 · KB5130034Microsoft (MSRC)
.NET 8.0 runtime installed on Mac OS8.0.32 · KB5130034Microsoft (MSRC)
.NET 8.0 runtime installed on Windows8.0.32 · KB5130034Microsoft (MSRC)
.NET 9.0 runtime installed on Linux9.0.21 · KB5130035Microsoft (MSRC)
.NET 9.0 runtime installed on Mac OS9.0.21 · KB5130035Microsoft (MSRC)
.NET 9.0 runtime installed on Windows9.0.21 · KB5130035Microsoft (MSRC)
Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 version 16072.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0 · KB5126868Microsoft (MSRC)
Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 20162.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0 · KB5126868Microsoft (MSRC)
Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 20192.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0 · KB5127666Microsoft (MSRC)
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 version 18092.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0 · KB5127666Microsoft (MSRC)
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 version 18092.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0 · KB5127685Microsoft (MSRC)
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 version 21H22.0.50727.9188 AND 3.0.30729.9171 AND 4.8.4811.0 · KB5127683Microsoft (MSRC)
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 version 22H22.0.50727.9188 AND 3.0.30729.9171 AND 4.8.4811.0 · KB5127683Microsoft (MSRC)
Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 20192.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0 · KB5127685Microsoft (MSRC)
Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 20222.0.50727.9188 AND 3.0.30729.9171 AND 4.8.4811.0 · KB5127687Microsoft (MSRC)
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 version 21H22.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0 · KB5127689Microsoft (MSRC)
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 version 22H22.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0 · KB5127689Microsoft (MSRC)
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 23H22.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0 · KB5127692Microsoft (MSRC)
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 24H22.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0 · KB5127690Microsoft (MSRC)
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 25H22.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0 · KB5127690Microsoft (MSRC)
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 26H22.0.50727.9188 AND 3.0.30729.9171 AND 4.8.10008.0 · KB5127694Microsoft (MSRC)
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 20222.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0 · KB5127693Microsoft (MSRC)
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 20252.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0 · KB5127690Microsoft (MSRC)
Microsoft .NET Framework 3.5 on Windows 11 version 26H12.0.50727.9188 AND 3.0.30729.9171 · KB5127696Microsoft (MSRC)

+86

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.

  1. Published
  2. Fix recordedsame day
  3. TodayOct 31, 2026+18 d
EPSS, last 120 days

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 researchers

Finders, 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.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

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.
  • 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-674 · Uncontrolled Recursion

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.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓
  2. SSVC exploitation— → none
  3. Exploit maturity— → none

For records you follow, these changes also arrive as notifications. →

References

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

All records