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Fencer Vulns
high 7.3

CVE-2026-35433 json

.NET Elevation of Privilege Vulnerability

published 2026-05-12 5 mo ago modified 2026-10-26 13 d ago also BIT-dotnet-2026-35433 , BIT-dotnet-sdk-2026-35433 , EUVD-2026-29634 , GHSA-8x9c-mqxv-q2pp

cvss
7.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 55%
public exploits
0
none known

Summary

Improper input validation in .NET allows an unauthorized attacker to elevate privileges locally.

Patch / fix

  • nuget Microsoft.WindowsDesktop.App.Runtime.win-arm64 8.0.27, 9.0.16, 10.0.8
  • nuget Microsoft.WindowsDesktop.App.Runtime.win-x64 8.0.27, 9.0.16, 10.0.8
  • nuget Microsoft.WindowsDesktop.App.Runtime.win-x86 8.0.27, 9.0.16, 10.0.8
  • bitnami dotnet 8.0.27, 9.0.16, 10.0.8
  • bitnami dotnet-sdk 8.0.27, 9.0.16, 10.0.8
  • Microsoft .NET 10.0 10.0.8
  • Microsoft .NET 8.0 8.0.27
  • Microsoft .NET 9.0 9.0.16
  • Microsoft Microsoft .NET Framework 3.5 4.8.9334.0 and 4.8.4802.0
  • Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 4.8.9334.0 and 4.8.4802.0
  • Microsoft Microsoft .NET Framework 3.5 AND 4.8 4.8.9334.0 and 4.8.4802.0
  • Microsoft Microsoft .NET Framework 3.5 AND 4.8.1 4.8.9334.0 and 4.8.4802.0
  • Microsoft Microsoft .NET Framework 4.8 4.8.9334.0 and 4.8.4802.0
  • dotnet8-runtime Alpine 3.24, Alpine 3.23, Alpine 3.22 +1 more 8.0.27-r0
  • dotnet9-runtime Alpine 3.24, Alpine 3.23, Alpine 3.22 +1 more 9.0.16-r0
  • dotnet10-runtime Alpine 3.24, Alpine 3.23 10.0.8-r0

alpine advisories ALPINE-CVE-2026-35433

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-2026-35433 updated cvss 7.3

dotnet: .NET: improper input validation allows an attacker to elevate privileges locally

  • Red Hat Enterprise Linux 8 dotnet, dotnet8.0, dotnet9.0, dotnet10.0, dotnet-host, dotnet-sdk-8.0, +38 more Red Hat Enterprise Linux 9 dotnet8.0, dotnet9.0, dotnet10.0, dotnet-host, dotnet-sdk-8.0, dotnet-sdk-9.0, +37 more Red Hat Enterprise Linux 10 dotnet8.0, dotnet9.0, dotnet10.0 Red Hat Hardened Images dotnet8.0, dotnet9.0, dotnet10.0
    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
5 mo ago

Exploit prediction

0.77% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.3 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L/E:U/RL:O/RC:C
CISA ADP 3.1 7.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
GitHub 3.1 7.3 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L
CNA 3.1 7.3 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L
CNA 3.1 7.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
OSV 3.1 7.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

Affected packages

ecosystem package affected fixed in
nuget Microsoft.WindowsDesktop.App.Runtime.win-arm64
>=8.0.0, <8.0.27
>=9.0.0, <9.0.16
>=10.0.0, <10.0.8
8.0.27
9.0.16
10.0.8
nuget Microsoft.WindowsDesktop.App.Runtime.win-x64
>=8.0.0, <8.0.27
>=9.0.0, <9.0.16
>=10.0.0, <10.0.8
8.0.27
9.0.16
10.0.8
nuget Microsoft.WindowsDesktop.App.Runtime.win-x86
>=8.0.0, <8.0.27
>=9.0.0, <9.0.16
>=10.0.0, <10.0.8
8.0.27
9.0.16
10.0.8
bitnami dotnet
>=8.0.0, <8.0.27
>=9.0.0, <9.0.16
>=10.0.0, <10.0.8
8.0.27
9.0.16
10.0.8
bitnami dotnet-sdk
>=8.0.0, <8.0.27
>=9.0.0, <9.0.16
>=10.0.0, <10.0.8
8.0.27
9.0.16
10.0.8

Affected products

  • Microsoft .NET 10.0
  • Microsoft .NET 8.0
  • Microsoft .NET 9.0
  • 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 3.5 AND 4.8.1
  • Microsoft Microsoft .NET Framework 4.8
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Hardened Images

Classification

Weakness
  • CWE-20 Improper Input Validation
  • CWE-190 Integer Overflow or Wraparound
  • CWE-122 Heap-based Buffer Overflow

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.