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CVE-2026-62897· NVD / CVE Program· CNA microsoft

.NET Framework Remote Code Execution Vulnerability

Noroxi assessment

Priority: Monitor (action score 28/100)

  • 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: 0.36% (FIRST EPSS).
  • Someone with local access to the system can trigger it. No account or password is required. A user must open a link or visit a page. Special conditions such as timing or configuration are required.
  • Fixed version: .NET 10.0 installed on Windows 10.0.11; .NET 8.0 installed on Windows 8.0.30; .NET 9.0 installed on Windows 9.0.19.

Low priority for now. Upgrade to .NET 10.0 installed on Windows 10.0.11; .NET 8.0 installed on Windows 8.0.30; .NET 9.0 installed on Windows 9.0.19 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

Integer overflow or wraparound in .NET Framework allows an unauthorized attacker to execute code locally.

HighCVSS 7.0 · v3.1—No exploit Fix available
Published
Aug 11, 2026
Updated
Oct 8, 2026
EPSS
0.4% · 29th percentile

Report tools

JSON

Action score

28

Monitor

Low priority for now.

CVSS
28 / 40 · 7.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · microsoft
7.0
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:3.1/AV:L/AC:H/PR:N/UI:R/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.

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-2026-62897

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
microsoft.net framework
microsoftwindows 11 26h1
microsoftwindows 10 1809
microsoftvisual studio 2022
microsoftvisual studio 2026
microsoft.net
microsoftwindows

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 8.0.30
  • microsoft .net10.0.0 and later · before 10.0.11
  • microsoft .net9.0.0 and later · before 9.0.19
  • microsoft .net framework3.5
  • microsoft .net framework4.7.2
  • microsoft .net framework4.8
  • microsoft .net framework4.8.1
  • microsoft visual studio 202217.14.0 and later · before 17.14.38
  • microsoft visual studio 202618.8.0 and later · before 18.8.3

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 10.0.11affected

  • Microsoft .NET 8.0

    • 8.0.0 and later · before 8.0.30affected

  • Microsoft .NET 9.0

    • 9.0.0 and later · before 9.0.19affected

  • Microsoft Microsoft .NET Framework 3.5

    • 3.5.0 and later · before 2.0.50727.9183 & 3.0.30729.9169affected

  • Microsoft Microsoft .NET Framework 3.5 AND 4.7.2

    • 4.7.0 and later · before 2.0.50727.9070 & 3.0.30729.9068 & 4.7.4144.0affected

  • Microsoft Microsoft .NET Framework 3.5 AND 4.8

    • 4.8.0 and later · before 2.0.50727.9070 & 3.0.30729.9068 & 4.8.4805.0affected

  • Microsoft Microsoft .NET Framework 4.8.1

    • 4.8.0.0 and later · before 4.8.9344.0affected

  • Microsoft Microsoft Visual Studio 2022 version 17.14

    • 17.14.0 and later · before 17.14.38affected

  • Microsoft Microsoft Visual Studio 2026 version 18.8

    • 18.0 and later · before 18.8.3affected

Package-level exposure

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

EcosystemPackageAffected rangeFix
NuGetMicrosoft.WindowsDesktop.App.Runtime.win-arm64from 10.0.0 · before 10.0.1110.0.11
NuGetMicrosoft.WindowsDesktop.App.Runtime.win-arm64from 8.0.0 · before 8.0.308.0.30
NuGetMicrosoft.WindowsDesktop.App.Runtime.win-arm64from 9.0.0 · before 9.0.199.0.19
NuGetMicrosoft.WindowsDesktop.App.Runtime.win-x64from 10.0.0 · before 10.0.1110.0.11
NuGetMicrosoft.WindowsDesktop.App.Runtime.win-x64from 8.0.0 · before 8.0.308.0.30
NuGetMicrosoft.WindowsDesktop.App.Runtime.win-x64from 9.0.0 · before 9.0.199.0.19
NuGetMicrosoft.WindowsDesktop.App.Runtime.win-x86from 10.0.0 · before 10.0.1110.0.11
NuGetMicrosoft.WindowsDesktop.App.Runtime.win-x86from 8.0.0 · before 8.0.308.0.30
NuGetMicrosoft.WindowsDesktop.App.Runtime.win-x86from 9.0.0 · before 9.0.199.0.19

Same product

microsoft: all records

Other highest-scoring records for the same primary product.

  • CVE-2020-0646A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly, aka '.NET Framework Remote KEV
    99Now
  • CVE-2024-29059.NET Framework Information Disclosure VulnerabilityKEV
    90Now
  • CVE-2017-8759Microsoft .NET Framework 2.0, 3.5, 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2 and 4.7 allow an attacker to execute code remotely via a malicious documeKEV
    88Now
  • CVE-2015-1671The Windows DirectWrite library, as used in Microsoft .NET Framework 3.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, and 4.5.2; Office 2007 SP3 and 2010KEV
    76This week
  • CVE-2023-36899ASP.NET Elevation of Privilege Vulnerability
    58Plan
  • CVE-2014-0257Microsoft .NET Framework 1.0 SP3, 1.1 SP1, 2.0 SP2, 3.5, 3.5.1, 4, 4.5, and 4.5.1 does not properly determine whether it is safe to execute
    58Plan

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 installed on Windows10.0.11 · KB5122106Microsoft (MSRC)
.NET 8.0 installed on Windows8.0.30 · KB5122104Microsoft (MSRC)
.NET 9.0 installed on Windows9.0.19 · KB5122105Microsoft (MSRC)
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for ARM64-based Systems2.0.50727.9070 & 3.0.30729.9068 & 4.7.4144.0 · KB5120698Microsoft (MSRC)
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for ARM64-based Systems2.0.50727.9070 & 3.0.30729.9068 & 4.8.4805.0 · KB5120703Microsoft (MSRC)
Microsoft .NET Framework 3.5 on Windows 11 Version 26H1 for ARM64-based Systems2.0.50727.9183 & 3.0.30729.9169 · KB5120747Microsoft (MSRC)
Microsoft .NET Framework 3.5 on Windows 11 version 26H1 for x64-based Systems2.0.50727.9183 & 3.0.30729.9169 · KB5120747Microsoft (MSRC)
Microsoft .NET Framework 4.8.1 on Windows 11 Version 26H1 for ARM64-based Systems4.8.9344.0 · KB5120711Microsoft (MSRC)
Microsoft .NET Framework 4.8.1 on Windows 11 version 26H1 for x64-based Systems4.8.9344.0 · KB5120711Microsoft (MSRC)
Microsoft Visual Studio 2022 version 17.1417.14.38Microsoft (MSRC)
Microsoft Visual Studio 2026 version 18.818.8.3Microsoft (MSRC)
NuGet:Microsoft.WindowsDesktop.App.Runtime.win-arm6410.0.11Package registry (OSV)
NuGet:Microsoft.WindowsDesktop.App.Runtime.win-arm648.0.30Package registry (OSV)
NuGet:Microsoft.WindowsDesktop.App.Runtime.win-arm649.0.19Package registry (OSV)
NuGet:Microsoft.WindowsDesktop.App.Runtime.win-x6410.0.11Package registry (OSV)
NuGet:Microsoft.WindowsDesktop.App.Runtime.win-x648.0.30Package registry (OSV)
NuGet:Microsoft.WindowsDesktop.App.Runtime.win-x649.0.19Package registry (OSV)
NuGet:Microsoft.WindowsDesktop.App.Runtime.win-x8610.0.11Package registry (OSV)
NuGet:Microsoft.WindowsDesktop.App.Runtime.win-x868.0.30Package registry (OSV)
NuGet:Microsoft.WindowsDesktop.App.Runtime.win-x869.0.19Package registry (OSV)

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.

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

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • Special conditions such as timing or configuration are required.

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
Local
Attack complexity
High
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-190 · Integer Overflow or Wraparound

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:N/UI:R/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.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

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