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Fencer Vulns
high 7.0

CVE-2026-62897 json

.NET Framework Remote Code Execution Vulnerability

published 2026-08-11 2 mo ago modified 2026-10-30 9 d ago also BIT-dotnet-2026-62897 , BIT-dotnet-sdk-2026-62897 , EUVD-2026-56406 , GHSA-fx4q-gjrx-2jw6

cvss
7.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 30%
public exploits
0
none known

Summary

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

Patch / fix

  • nuget Microsoft.WindowsDesktop.App.Runtime.win-arm64 8.0.30, 9.0.19, 10.0.11
  • nuget Microsoft.WindowsDesktop.App.Runtime.win-x64 8.0.30, 9.0.19, 10.0.11
  • nuget Microsoft.WindowsDesktop.App.Runtime.win-x86 8.0.30, 9.0.19, 10.0.11
  • bitnami dotnet 8.0.30, 9.0.19, 10.0.11
  • bitnami dotnet-sdk 8.0.30, 9.0.19, 10.0.11
  • Microsoft .NET 10.0 runtime 10.0.11
  • Microsoft .NET 8.0 runtime 8.0.30
  • Microsoft .NET 9.0 runtime 9.0.19
  • Microsoft Microsoft .NET Framework 3.5 2.0.50727.9183 & 3.0.30729.9169
  • Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 2.0.50727.9070 & 3.0.30729.9068 & 4.7.4144.0
  • Microsoft Microsoft .NET Framework 3.5 AND 4.8 2.0.50727.9070 & 3.0.30729.9068 & 4.8.4805.0
  • Microsoft Microsoft .NET Framework 4.8.1 4.8.9344.0
  • Microsoft Microsoft Visual Studio 2022 version 17.14 17.14.38
  • Microsoft Microsoft Visual Studio 2026 version 18.8 18.8.3
  • dotnet8-runtime Alpine 3.24, Alpine 3.23, Alpine 3.22 8.0.31-r0
  • dotnet9-runtime Alpine 3.24, Alpine 3.23, Alpine 3.22 9.0.20-r0
  • dotnet10-runtime Alpine 3.23 10.0.13-r0
  • dotnet10-runtime Alpine 3.24 10.0.12-r0

alpine advisories ALPINE-CVE-2026-62897

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-62897 updated cvss 7.0

dotnet: .NET Framework: Local Code Execution via Integer Overflow

  • Red Hat Enterprise Linux 8 dotnet, dotnet8.0, dotnet9.0, dotnet/sdk, dotnet10.0, dotnet-host, +39 more Red Hat Enterprise Linux 9 dotnet6.0, dotnet7.0, dotnet8.0, dotnet9.0, dotnet/sdk, dotnet10.0, +59 more Red Hat Enterprise Linux 10 dotnet8.0, dotnet9.0, dotnet10.0, dotnet11.0 Red Hat Hardened Images dotnet8.0, dotnet9.0, dotnet10.0 Red Hat OpenShift Dev Spaces devspaces/udi-rhel9
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2 mo ago

Exploit prediction

0.37% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.0 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
GitHub 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
OSV 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
nuget Microsoft.WindowsDesktop.App.Runtime.win-arm64
>=10.0.0, <10.0.11
>=9.0.0, <9.0.19
>=8.0.0, <8.0.30
10.0.11
9.0.19
8.0.30
nuget Microsoft.WindowsDesktop.App.Runtime.win-x64
>=10.0.0, <10.0.11
>=9.0.0, <9.0.19
>=8.0.0, <8.0.30
10.0.11
9.0.19
8.0.30
nuget Microsoft.WindowsDesktop.App.Runtime.win-x86
>=10.0.0, <10.0.11
>=9.0.0, <9.0.19
>=8.0.0, <8.0.30
10.0.11
9.0.19
8.0.30
bitnami dotnet
>=8.0.0, <8.0.30
>=9.0.0, <9.0.19
>=10.0.0, <10.0.11
8.0.30
9.0.19
10.0.11
bitnami dotnet-sdk
>=8.0.0, <8.0.30
>=9.0.0, <9.0.19
>=10.0.0, <10.0.11
8.0.30
9.0.19
10.0.11

Affected products

  • Microsoft .NET 10.0 runtime
  • Microsoft .NET 8.0 runtime
  • Microsoft .NET 9.0 runtime
  • Microsoft Microsoft .NET Framework 3.5
  • Microsoft Microsoft .NET Framework 3.5 AND 4.7.2
  • Microsoft Microsoft .NET Framework 3.5 AND 4.8
  • Microsoft Microsoft .NET Framework 4.8.1
  • Microsoft Microsoft Visual Studio 2022 version 17.14
  • Microsoft Microsoft Visual Studio 2026 version 18.8

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.