Skip to content
Sign in
CVE-2026-840087.5HighCWE-407

CVE-2026-84008: .NET Denial of Service Vulnerability

Microsoft · Microsoft .NET Framework 3.5

Vendor fix available · Affected: Microsoft .NET Framework 3.5 · Exploitation: unlikely (under 1%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

1.0%probability of exploitation in the next 30 days
63rd percentile
050100

Higher than 63% of scored CVEs

7.5HighCVSS 3.1
LowHigh

DescriptionCVE.org

Inefficient algorithmic complexity in .NET allows an unauthorized attacker to deny service over a network.

Affected products11

From the CVE record. A product or version that is not listed is unknown, not unaffected.

  • Microsoft · Microsoft .NET Framework 3.5from 3.5.0 before 2.0.50727.9188 AND 3.0.30729.9171
  • Microsoft · Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2from 3.0.0.0 before 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0
  • Microsoft · Microsoft .NET Framework 3.5 AND 4.7.2from 4.7.0 before 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0
  • Microsoft · Microsoft .NET Framework 3.5 AND 4.8from 4.8.0 before 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0
  • Microsoft · Microsoft .NET Framework 3.5 AND 4.8.1from 4.8.1 before 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0
  • Microsoft · Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2from 4.7.0 before 4.7.4150.0
  • Microsoft · Microsoft .NET Framework 4.8from 4.8.0 before 4.8.4811.0
  • Microsoft · Microsoft .NET Framework 4.8.1from 4.8.0.0 before 4.8.9363.0
  • Microsoft · Microsoft Visual Studio 2022 version 17.14from 17.14.0 before 17.14.42
  • Microsoft · Microsoft Visual Studio 2026 version 18.10from 18.10.0 before 18.10.4
  • Microsoft · System.Security.Cryptography.Pkcsfrom 10.0.0 before 10.0.13

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas
Exploitation
Unlikely (under 1%). EPSS under 1%, or no score yet.
CISA KEV
Not listed
Public check
No public nuclei template
Vendor
Microsoft
Published
October 2026

CoverageNo articles yet

No CyberSIXT article names CVE-2026-84008 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.

References

Updated AboutDevelopersSign in