CVE-2026-96957

highpriority · track · 35EPSS 0.005 · 45 %ileDEFRNLUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.53% (45th) EPSS

CVSS 8.8 · high

Is it mine?

84 products

Check your exposure

Who says so?

5 sources

osv · cert_bund · ncsc_nl · msrc_csaf

EPSS · scored 2026-10-26

Improper verification of cryptographic signature in .NET allows an unauthorized attacker to bypass a security feature over a network.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

Fixed.NET 10.0 runtime installed on Linuxmsrc_csaf
10.0.402:Security Update:https://support.microsoft.com/help/5130036
https://support.microsoft.com/help/5130036
Fixed.NET 10.0 runtime installed on Mac OSmsrc_csaf
10.0.402:Security Update:https://support.microsoft.com/help/5130036
https://support.microsoft.com/help/5130036
Fixed.NET 10.0 runtime installed on Windowsmsrc_csaf
10.0.402:Security Update:https://support.microsoft.com/help/5130036
https://support.microsoft.com/help/5130036
Fixed.NET 11.0 runtime installed on Linuxmsrc_csaf
11.0.100-rc.2:Security Update:https://github.com/dotnet/announcements/issues/487
https://github.com/dotnet/announcements/issues/487
Fixed.NET 11.0 runtime installed on Mac OSmsrc_csaf
11.0.100-rc.2:Security Update:https://github.com/dotnet/announcements/issues/487
https://github.com/dotnet/announcements/issues/487
Fixed.NET 11.0 runtime installed on Windowsmsrc_csaf
11.0.100-rc.2:Security Update:https://github.com/dotnet/announcements/issues/487
https://github.com/dotnet/announcements/issues/487
FixedMicrosoft Visual Studio 2022 version 17.14msrc_csaf
17.14.42:Security Update:https://learn.microsoft.com/en-us/visualstudio/releases/2022/release-notes
https://learn.microsoft.com/en-us/visualstudio/releases/2022/release-notes
FixedMicrosoft Visual Studio 2026 version 18.10msrc_csaf
18.10.4:Security Update:https://learn.microsoft.com/en-us/visualstudio/releases/2026/release-notes
https://learn.microsoft.com/en-us/visualstudio/releases/2026/release-notes

cvss

Technical severity, 0–10. One row per scoring source.

8.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hprimary · secure@microsoft.com USexploitability 2.8 · impact 5.9

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · Microsoft Security Response Center US

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-347USCWE-347USCWE-347US

affected products (84)

Products and version ranges known to be affected.

Fedora Linuxall versionscert_bundDEcpe:/o:fedoraproject:fedora:-
Microsoft .NET 10.0all versionscert_bundDEcpe:/a:microsoft:.net:10.0
Microsoft .NET 11.0all versionscert_bundDEcpe:/a:microsoft:.net:11.0
Microsoft .NET 8.0all versionscert_bundDEcpe:/a:microsoft:.net:8.0
Microsoft .NET 9.0all versionscert_bundDEcpe:/a:microsoft:.net:9.0
Microsoft .NET Framework 3.5all versionscert_bundDEcpe:/a:microsoft:.net_framework:3.5
Microsoft .NET Framework 4.6.2all versionscert_bundDEcpe:/a:microsoft:.net_framework:4.6.2
Microsoft .NET Framework 4.7all versionscert_bundDEcpe:/a:microsoft:.net_framework:4.7
Microsoft .NET Framework 4.7.1all versionscert_bundDEcpe:/a:microsoft:.net_framework:4.7.1
Microsoft .NET Framework 4.7.2all versionscert_bundDEcpe:/a:microsoft:.net_framework:4.7.2
Microsoft .NET Framework 4.8all versionscert_bundDEcpe:/a:microsoft:.net_framework:4.8
Microsoft .NET Framework 4.8.1all versionscert_bundDEcpe:/a:microsoft:.net_framework:4.8.1
Microsoft ASP.NET Core 10.0all versionscert_bundDEcpe:/a:microsoft:asp.net:core_10.0
Microsoft ASP.NET Core 8.0all versionscert_bundDEcpe:/a:microsoft:asp.net:core_3.1
Microsoft ASP.NET Core 8.0all versionscert_bundDEcpe:/a:microsoft:asp.net:core_8.0
Microsoft ASP.NET Core 9.0all versionscert_bundDEcpe:/a:microsoft:asp.net:core_9.0
Microsoft PowerShell 7.4all versionscert_bundDEcpe:/a:microsoft:powershell:7.4
Microsoft PowerShell 7.5all versionscert_bundDEcpe:/a:microsoft:powershell:7.5
Microsoft PowerShell 7.6all versionscert_bundDEcpe:/a:microsoft:powershell:7.6
Microsoft SysInternals Suiteall versionscert_bundDEcpe:/a:microsoft:sysinternals:suite

showing 20 of 84

advisories (7)

Vendor and ecosystem advisories describing this.

NCSC-2026-0426Kwetsbaarheden verholpen in Microsoft Developer ToolsNL2026-10-13csaf · ncsc_nlNL
Microsoft heeft kwetsbaarheden verholpen in diverse componenten van de Developer Tools, zoals .NET en Visual Studio.
WID-SEC-W-2026-3893Microsoft Entwicklerwerkzeuge: Mehrere SchwachstellenDeutsch2026-10-13csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Microsoft .NET Framework, Microsoft .NET, Microsoft ASP.NET, Microsoft Visual Studio 2022, Microsoft Visual Studio 2026, Microsoft Visual Studio Code, Microsoft SysInternals und Microsoft PowerShell ausnutzen, um seine Privilegien zu erhöhen, um Code auszuführen, um Informationen offenzulegen, um Sicherheitsmechanismen zu umgehen und um einen Denial of Service Zustand herbeizuführen.
msrc_CVE-2026-96957.NET Security Feature Bypass Vulnerability2026-10-13csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
BIT-dotnet-2026-96957.NET Security Feature Bypass Vulnerability2026-10-19vendor · osvUS
Improper verification of cryptographic signature in .NET allows an unauthorized attacker to bypass a security feature over a network.
BIT-dotnet-sdk-2026-96957.NET Security Feature Bypass Vulnerability2026-10-19vendor · osvUS
Improper verification of cryptographic signature in .NET allows an unauthorized attacker to bypass a security feature over a network.
CERTFR-2026-AVI-1313Multiples vulnérabilités dans Microsoft .NetFrançais2026-10-14vendor · certfrFR
CERTFR-2026-AVI-1316Multiples vulnérabilités dans les produits MicrosoftFrançais2026-10-14vendor · certfrFR

also known as (2)

Other names and identifiers for this entity.

BIT-dotnet-2026-96957osv
BIT-dotnet-sdk-2026-96957osv

sources

Which sources assert this record, and when.

osv cert_bund ncsc_nl msrc_csaf certfr NVD CVE.org MITRE

published 2026-10-13modified 2026-10-22

references (1) nvd

External citations — patches, advisories, analysis.

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96957Vendor Advisory

scry

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