Security October 2026 CVE-2026-96229
AssessmentPermissive list of allowed inputs in .NET allows an unauthorized attacker to disclose information over a network.
Severity Important
CVSS base score 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Impact Information Disclosure
EPSS · 30-day forecast 0.9% FIRST forecast dated 7 Nov 2026, for the following 30 days · FIRST percentile 61.4% · about EPSS
Public detection template No Nuclei template is listed in the current collected catalog
Exploitation detected No known exploitation (MSRC assessment)
Exploitability Exploitation Less Likely
Publicly disclosed No (MSRC assessment)
Customer action Required: follow the MSRC remediation guidance
Component .NET
Weakness CWE-183: Permissive List of Allowed Inputs
Issued by Microsoft
Last revised 13 Oct 2026 CVSS 3.1 base metrics Red raises the risk · green lowers it
Attack vector NetworkAV:N
Attack complexity LowAC:L
Privileges required NonePR:N
User interaction RequiredUI:R
Scope UnchangedS:U
Confidentiality HighC:H
Integrity NoneI:N
Availability NoneA:N
Affected productsDeveloper Tools
Source. This summary comes from MSRC's public CVRF document for October 2026. If the MSRC page is blocked in your browser, the NVD and CVE.org records carry the same identifier. None of this says whether your devices are affected.
What changed
Detection template: Unknown: detection-template evidence is incomplete or retained → No Nuclei template listed
6 Nov 2026 · 17:32:22 UTC Detection template: No Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
6 Nov 2026 · 16:31:02 UTC Detection template: Unknown: detection-template evidence is incomplete or retained → No Nuclei template listed
2 Nov 2026 · 17:30:39 UTC Detection template: No Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
2 Nov 2026 · 16:27:39 UTC Detection template: No Nuclei template listed · Customer action: Required: apply the update → Required: follow the MSRC remediation guidance · Public disclosure: No → No (MSRC assessment) · Exploitation detected: Not reported by MSRC → No known exploitation (MSRC assessment)
29 Oct 2026 Detection template: Unknown: exploit-code evidence is incomplete or retained → No Nuclei template listed · CISA KEV: Unknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
23 Oct 2026 · 09:33:49 UTC Detection template: No Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained · CISA KEV: Not listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
23 Oct 2026 · 08:31:50 UTC Fixes: KB5130034: .NET 8.0 installed on Windows; KB5130035: .NET 9.0 installed on Windows; KB5130036: .NET 10.0 installed on Windows → KB5130034: .NET 8.0 runtime installed on Windows; KB5130035: .NET 9.0 runtime installed on Windows; KB5130036: .NET 10.0 runtime installed on Windows · Affected products: .NET 10.0 installed on Windows, .NET 11.0 installed on Windows, .NET 8.0 installed on Windows, .NET 9.0 installed on Windows, Microsoft Visual Studio 2022 version 17.14, Microsoft Visual Studio 2026 version 18.10 → .NET 10.0 runtime installed on Windows, .NET 11.0 runtime installed on Windows, .NET 8.0 runtime installed on Windows, .NET 9.0 runtime installed on Windows, Microsoft Visual Studio 2022 version 17.14, Microsoft Visual Studio 2026 version 18.10
22 Oct 2026 Page history
Changes are dated when recorded; day views use the last saved version from that UTC day, and citations stay fixed.
Cite this version Field-level log (59)
Up to 100 recent field edits are shown; older edits may be outside retention.
7 Nov 2026 · 16:12:44 UTC
EPSS 0.9%; scored 6 Nov 2026 → 0.9%; scored 7 Nov 2026 6 Nov 2026 · 19:15:37 UTC
EPSS 0.9%; scored 5 Nov 2026 → 0.9%; scored 6 Nov 2026 6 Nov 2026 · 17:32:22 UTC
Public detection template Unknown: detection-template evidence is incomplete or retained → No Nuclei template listed 6 Nov 2026 · 17:32:22 UTC
Source coverage: public-exploit-code Incomplete → Current 6 Nov 2026 · 17:32:22 UTC
Source coverage: first-epss Incomplete → Current 6 Nov 2026 · 17:32:22 UTC
Source coverage: msrc-cvrf Incomplete → Current 6 Nov 2026 · 16:31:02 UTC
Public detection template No Nuclei template listed → Unknown: detection-template evidence is incomplete or retained 6 Nov 2026 · 16:31:02 UTC
Source coverage: public-exploit-code Current → Incomplete 6 Nov 2026 · 16:31:02 UTC
Source coverage: first-epss Current → Incomplete 6 Nov 2026 · 16:31:02 UTC
Source coverage: msrc-cvrf Current → Incomplete 5 Nov 2026 · 23:42:03 UTC
EPSS 0.9%; scored 4 Nov 2026 → 0.9%; scored 5 Nov 2026 5 Nov 2026 · 02:36:20 UTC
EPSS 0.9%; scored 3 Nov 2026 → 0.9%; scored 4 Nov 2026 4 Nov 2026 · 03:04:37 UTC
EPSS 0.9%; scored 2 Nov 2026 → 0.9%; scored 3 Nov 2026 3 Nov 2026 · 01:53:36 UTC
EPSS 0.9%; scored 1 Nov 2026 → 0.9%; scored 2 Nov 2026 2 Nov 2026 · 17:30:39 UTC
Public detection template Unknown: detection-template evidence is incomplete or retained → No Nuclei template listed 2 Nov 2026 · 17:30:39 UTC
Source coverage: public-exploit-code Incomplete → Current 2 Nov 2026 · 17:30:39 UTC
Source coverage: first-epss Incomplete → Current 2 Nov 2026 · 17:30:39 UTC
Source coverage: msrc-cvrf Incomplete → Current 2 Nov 2026 · 16:27:39 UTC
Public detection template No Nuclei template listed → Unknown: detection-template evidence is incomplete or retained 2 Nov 2026 · 16:27:39 UTC
Source coverage: public-exploit-code Current → Incomplete 2 Nov 2026 · 16:27:39 UTC
Source coverage: first-epss Current → Incomplete 2 Nov 2026 · 16:27:39 UTC
Source coverage: msrc-cvrf Current → Incomplete 2 Nov 2026 · 00:36:51 UTC
EPSS 0.9%; scored 31 Oct 2026 → 0.9%; scored 1 Nov 2026 31 Oct 2026 · 18:22:15 UTC
EPSS 0.9%; scored 30 Oct 2026 → 0.9%; scored 31 Oct 2026 30 Oct 2026 · 18:02:45 UTC
EPSS 0.9%; scored 29 Oct 2026 → 0.9%; scored 30 Oct 2026 29 Oct 2026 · 20:19:26 UTC
Public detection template No Nuclei template listed 29 Oct 2026 · 20:19:26 UTC
Customer action Required: apply the update → Required: follow the MSRC remediation guidance 29 Oct 2026 · 20:19:26 UTC
Publicly disclosed No → No (MSRC assessment) 29 Oct 2026 · 20:19:26 UTC
Exploitation detected Not reported by MSRC → No known exploitation (MSRC assessment) 29 Oct 2026 · 18:33:30 UTC
EPSS 0.9%; scored 28 Oct 2026 → 0.9%; scored 29 Oct 2026 28 Oct 2026 · 20:00:33 UTC
EPSS 0.9%; scored 27 Oct 2026 → 0.9%; scored 28 Oct 2026 27 Oct 2026 · 15:48:13 UTC
EPSS 0.9%; scored 26 Oct 2026 → 0.9%; scored 27 Oct 2026 26 Oct 2026 · 23:57:09 UTC
EPSS 0.9%; scored 25 Oct 2026 → 0.9%; scored 26 Oct 2026 25 Oct 2026 · 17:12:51 UTC
EPSS 0.8%; scored 24 Oct 2026 → 0.9%; scored 25 Oct 2026 25 Oct 2026 · 01:34:18 UTC
EPSS 0.8%; scored 23 Oct 2026 → 0.8%; scored 24 Oct 2026 23 Oct 2026 · 15:51:28 UTC
EPSS 0.8%; scored 22 Oct 2026 → 0.8%; scored 23 Oct 2026 23 Oct 2026 · 09:33:49 UTC
Public exploit code Unknown: exploit-code evidence is incomplete or retained → No Nuclei template listed 23 Oct 2026 · 09:33:49 UTC
CISA KEV Unknown: catalog evidence is incomplete or retained → Not listed in the collected catalog 23 Oct 2026 · 09:33:49 UTC
Source coverage: public-exploit-code Incomplete → Current 23 Oct 2026 · 09:33:49 UTC
Source coverage: first-epss Incomplete → Current 23 Oct 2026 · 09:33:49 UTC
Source coverage: cisa-kev Incomplete → Current 23 Oct 2026 · 09:33:49 UTC
Source coverage: msrc-cvrf Incomplete → Current 23 Oct 2026 · 08:31:50 UTC
Public exploit code No Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained 23 Oct 2026 · 08:31:50 UTC
CISA KEV Not listed in the collected catalog → Unknown: catalog evidence is incomplete or retained 23 Oct 2026 · 08:31:50 UTC
Source coverage: public-exploit-code Current → Incomplete 23 Oct 2026 · 08:31:50 UTC
Source coverage: first-epss Current → Incomplete 23 Oct 2026 · 08:31:50 UTC
Source coverage: cisa-kev Current → Incomplete 23 Oct 2026 · 08:31:50 UTC
Source coverage: msrc-cvrf Current → Incomplete 22 Oct 2026 · 22:02:57 UTC
Updates that fix it KB5130034: .NET 8.0 installed on Windows; KB5130035: .NET 9.0 installed on Windows; KB5130036: .NET 10.0 installed on Windows → KB5130034: .NET 8.0 runtime installed on Windows; KB5130035: .NET 9.0 runtime installed on Windows; KB5130036: .NET 10.0 runtime installed on Windows 22 Oct 2026 · 22:02:57 UTC
Affected products .NET 10.0 installed on Windows, .NET 11.0 installed on Windows, .NET 8.0 installed on Windows, .NET 9.0 installed on Windows, Microsoft Visual Studio 2022 version 17.14, Microsoft Visual Studio 2026 version 18.10 → .NET 10.0 runtime installed on Windows, .NET 11.0 runtime installed on Windows, .NET 8.0 runtime installed on Windows, .NET 9.0 runtime installed on Windows, Microsoft Visual Studio 2022 version 17.14, Microsoft Visual Studio 2026 version 18.10 22 Oct 2026 · 17:33:15 UTC
EPSS 0.8%; scored 21 Oct 2026 → 0.8%; scored 22 Oct 2026 21 Oct 2026 · 21:47:24 UTC
EPSS 0.8%; scored 20 Oct 2026 → 0.8%; scored 21 Oct 2026 20 Oct 2026 · 20:53:31 UTC
EPSS 0.8%; scored 19 Oct 2026 → 0.8%; scored 20 Oct 2026 19 Oct 2026 · 15:12:40 UTC
EPSS 0.8%; scored 18 Oct 2026 → 0.8%; scored 19 Oct 2026 18 Oct 2026 · 14:54:30 UTC
EPSS 0.8%; scored 16 Oct 2026 → 0.8%; scored 18 Oct 2026 18 Oct 2026 · 14:54:30 UTC
Link: October 2026 /security?release=2026-Oct#cves 16 Oct 2026 · 16:13:25 UTC
EPSS 0.8%; scored 15 Oct 2026 → 0.8%; scored 16 Oct 2026 15 Oct 2026 · 21:30:54 UTC
EPSS 0.8%; scored 14 Oct 2026 → 0.8%; scored 15 Oct 2026 15 Oct 2026 · 01:07:54 UTC
EPSS Not scored → 0.8%; scored 14 Oct 2026 Explore global source statements, affected packages and advisory history for CVE-2026-96229 . The catalog has a separate collection scope from Microsoft release records.
Overview Affected History Connections
cve-program · CVE-2026-96229 Published .NET 10.0 runtime Vendor product
Original vendor version evidence · not evaluated as a NuGet range {
"vendor": "Microsoft",
"product": ".NET 10.0 runtime",
"versions": [
{
"version": "10.0.0",
"lessThan": "10.0.13",
"versionType": "custom",
"status": "affected"
}
]
} .NET 11.0 runtime Vendor product
Original vendor version evidence · not evaluated as a NuGet range {
"vendor": "Microsoft",
"product": ".NET 11.0 runtime",
"versions": [
{
"version": "11.0.0",
"lessThan": "11.0.0-rc.2",
"versionType": "custom",
"status": "affected"
}
]
} .NET 8.0 runtime Vendor product
Original vendor version evidence · not evaluated as a NuGet range {
"vendor": "Microsoft",
"product": ".NET 8.0 runtime",
"versions": [
{
"version": "8.0.0",
"lessThan": "8.0.32",
"versionType": "custom",
"status": "affected"
}
]
} .NET 9.0 runtime Vendor product
Original vendor version evidence · not evaluated as a NuGet range {
"vendor": "Microsoft",
"product": ".NET 9.0 runtime",
"versions": [
{
"version": "9.0.0",
"lessThan": "9.0.21",
"versionType": "custom",
"status": "affected"
}
]
} Microsoft Visual Studio 2022 version 17.14 Vendor product
Original vendor version evidence · not evaluated as a NuGet range {
"vendor": "Microsoft",
"product": "Microsoft Visual Studio 2022 version 17.14",
"versions": [
{
"version": "17.14.0",
"lessThan": "17.14.42",
"versionType": "custom",
"status": "affected"
}
]
} Microsoft Visual Studio 2026 version 18.10 Vendor product
Original vendor version evidence · not evaluated as a NuGet range {
"vendor": "Microsoft",
"product": "Microsoft Visual Studio 2026 version 18.10",
"versions": [
{
"version": "18.10.0",
"lessThan": "18.10.4",
"versionType": "custom",
"status": "affected"
}
]
} Original source record · Cite this exact observation · Complete original publisher JSON
euvd · EUVD-2026-100204 Published EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.
Original publisher date fields datePublished: Oct 13, 2026, 7:01:16 PM
dateUpdated: Oct 31, 2026, 6:11:05 PM
2 related source bulletins · separate from aliases WID-SEC-W-2026-3893: Microsoft Entwicklerwerkzeuge: Mehrere Schwachstellen
CVE-2026-100205 · CVE-2026-102229 · CVE-2026-102231 · CVE-2026-102232 · CVE-2026-102233 · CVE-2026-102234 · CVE-2026-102235 · CVE-2026-102238 · CVE-2026-102851 · CVE-2026-102869 · CVE-2026-102870 · CVE-2026-103572 · CVE-2026-105016 · CVE-2026-105729 · CVE-2026-105732 · CVE-2026-108398 · CVE-2026-109468 · CVE-2026-58280 · CVE-2026-66822 · CVE-2026-69370 · CVE-2026-69651 · CVE-2026-70007 · CVE-2026-70035 · CVE-2026-70098 · CVE-2026-70159 · CVE-2026-70161 · CVE-2026-70162 · CVE-2026-70165 · CVE-2026-70174 · CVE-2026-70175 · CVE-2026-70179 · CVE-2026-70181 · CVE-2026-70183 · CVE-2026-70186 · CVE-2026-70188 · CVE-2026-70190 · CVE-2026-70194 · CVE-2026-70196 · CVE-2026-70197 · CVE-2026-83520 · CVE-2026-84008 · CVE-2026-85363 · CVE-2026-85790 · CVE-2026-87697 · CVE-2026-88092 · CVE-2026-92707 · CVE-2026-96222 · CVE-2026-96224 · CVE-2026-96225 · CVE-2026-96229 · CVE-2026-96230 · CVE-2026-96231 · CVE-2026-96232 · CVE-2026-96233 · CVE-2026-96234 · CVE-2026-96235 · CVE-2026-96236 · CVE-2026-96237 · CVE-2026-96238 · CVE-2026-96251 · CVE-2026-96303 · CVE-2026-96957 · CVE-2026-96958 · CVE-2026-96959 · CVE-2026-96960 · CVE-2026-97788 · CVE-2026-97801
NCSC-2026-0426: Kwetsbaarheden verholpen in Microsoft Developer Tools
CVE-2026-58280 · CVE-2026-66822 · CVE-2026-69370 · CVE-2026-69651 · CVE-2026-69905 · CVE-2026-69914 · CVE-2026-69945 · CVE-2026-69969 · CVE-2026-69979 · CVE-2026-70007 · CVE-2026-70035 · CVE-2026-70098 · CVE-2026-70159 · CVE-2026-70161 · CVE-2026-70165 · CVE-2026-70174 · CVE-2026-70175 · CVE-2026-70179 · CVE-2026-70181 · CVE-2026-70183 · CVE-2026-70186 · CVE-2026-70188 · CVE-2026-70190 · CVE-2026-70194 · CVE-2026-70196 · CVE-2026-70197 · CVE-2026-83520 · CVE-2026-84008 · CVE-2026-85363 · CVE-2026-85849 · CVE-2026-85934 · CVE-2026-87697 · CVE-2026-88092 · CVE-2026-96224 · CVE-2026-96225 · CVE-2026-96229 · CVE-2026-96230 · CVE-2026-96231 · CVE-2026-96232 · CVE-2026-96233 · CVE-2026-96234 · CVE-2026-96235 · CVE-2026-96236 · CVE-2026-96237 · CVE-2026-96238 · CVE-2026-96957 · CVE-2026-96958 · CVE-2026-96959 · CVE-2026-96960 · CVE-2026-102229 · CVE-2026-102230 · CVE-2026-102231 · CVE-2026-102232 · CVE-2026-102233 · CVE-2026-102234 · CVE-2026-102235 · CVE-2026-102238 · CVE-2026-102851 · CVE-2026-102870 · CVE-2026-103572 · CVE-2026-108398 · CVE-2026-102869
No normalized affected-package data is projected for this source revision. The original publisher record may contain additional product and version evidence; this does not establish that a package is unaffected.
Original source record · Cite this exact observation · Complete original publisher JSON
nvd · CVE-2026-96229 Published NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.
Source analysis status: Awaiting Analysis
Weakness classifications: CWE-183
Original publisher date fields published: 2026-10-13T19:21:48.600
lastModified: 2026-10-22T22:19:55.700
No normalized affected-package data is projected for this source revision. The original publisher record may contain additional product and version evidence; this does not establish that a package is unaffected.
Original source record · Cite this exact observation · Complete original publisher JSON
osv · GHSA-5qr9-xxm9-6cmq Published Microsoft.WindowsDesktop.App.Runtime.win-arm64 NuGet
ECOSYSTEM · introduced 9.0.0 → fixed 9.0.21
21 explicitly affected versions 9.0.0, 9.0.1, 9.0.10, 9.0.11, 9.0.12, 9.0.13, 9.0.14, 9.0.15, 9.0.16, 9.0.17, 9.0.18, 9.0.19, 9.0.2, 9.0.20, 9.0.3, 9.0.4, 9.0.5, 9.0.6, 9.0.7, 9.0.8, 9.0.9
Microsoft.WindowsDesktop.App.Runtime.win-x64 NuGet
ECOSYSTEM · introduced 9.0.0 → fixed 9.0.21
21 explicitly affected versions 9.0.0, 9.0.1, 9.0.10, 9.0.11, 9.0.12, 9.0.13, 9.0.14, 9.0.15, 9.0.16, 9.0.17, 9.0.18, 9.0.19, 9.0.2, 9.0.20, 9.0.3, 9.0.4, 9.0.5, 9.0.6, 9.0.7, 9.0.8, 9.0.9
Microsoft.WindowsDesktop.App.Runtime.win-x86 NuGet
ECOSYSTEM · introduced 9.0.0 → fixed 9.0.21
21 explicitly affected versions 9.0.0, 9.0.1, 9.0.10, 9.0.11, 9.0.12, 9.0.13, 9.0.14, 9.0.15, 9.0.16, 9.0.17, 9.0.18, 9.0.19, 9.0.2, 9.0.20, 9.0.3, 9.0.4, 9.0.5, 9.0.6, 9.0.7, 9.0.8, 9.0.9
Microsoft.WindowsDesktop.App.Runtime.win-arm64 NuGet
ECOSYSTEM · introduced 10.0.0 → fixed 10.0.13
13 explicitly affected versions 10.0.0, 10.0.1, 10.0.10, 10.0.11, 10.0.12, 10.0.2, 10.0.3, 10.0.4, 10.0.5, 10.0.6, 10.0.7, 10.0.8, 10.0.9
Microsoft.WindowsDesktop.App.Runtime.win-x64 NuGet
ECOSYSTEM · introduced 10.0.0 → fixed 10.0.13
13 explicitly affected versions 10.0.0, 10.0.1, 10.0.10, 10.0.11, 10.0.12, 10.0.2, 10.0.3, 10.0.4, 10.0.5, 10.0.6, 10.0.7, 10.0.8, 10.0.9
Microsoft.WindowsDesktop.App.Runtime.win-x86 NuGet
ECOSYSTEM · introduced 10.0.0 → fixed 10.0.13
13 explicitly affected versions 10.0.0, 10.0.1, 10.0.10, 10.0.11, 10.0.12, 10.0.2, 10.0.3, 10.0.4, 10.0.5, 10.0.6, 10.0.7, 10.0.8, 10.0.9
Microsoft.WindowsDesktop.App.Runtime.win-arm64 NuGet
ECOSYSTEM · introduced 11.0.0-preview.1 → fixed 11.0.0-rc.2
Microsoft.WindowsDesktop.App.Runtime.win-x64 NuGet
ECOSYSTEM · introduced 11.0.0-preview.1 → fixed 11.0.0-rc.2
Microsoft.WindowsDesktop.App.Runtime.win-x86 NuGet
ECOSYSTEM · introduced 11.0.0-preview.1 → fixed 11.0.0-rc.2
Microsoft.WindowsDesktop.App.Runtime.win-arm64 NuGet
ECOSYSTEM · introduced 8.0.0 → fixed 8.0.32
31 explicitly affected versions 8.0.0, 8.0.1, 8.0.10, 8.0.11, 8.0.12, 8.0.13, 8.0.14, 8.0.15, 8.0.16, 8.0.17, 8.0.18, 8.0.19, 8.0.2, 8.0.20, 8.0.21, 8.0.22, 8.0.23, 8.0.24, 8.0.25, 8.0.26, 8.0.27, 8.0.28, 8.0.29, 8.0.3, 8.0.30, 8.0.31, 8.0.4, 8.0.5, 8.0.6, 8.0.7, 8.0.8
Microsoft.WindowsDesktop.App.Runtime.win-x64 NuGet
ECOSYSTEM · introduced 8.0.0 → fixed 8.0.32
31 explicitly affected versions 8.0.0, 8.0.1, 8.0.10, 8.0.11, 8.0.12, 8.0.13, 8.0.14, 8.0.15, 8.0.16, 8.0.17, 8.0.18, 8.0.19, 8.0.2, 8.0.20, 8.0.21, 8.0.22, 8.0.23, 8.0.24, 8.0.25, 8.0.26, 8.0.27, 8.0.28, 8.0.29, 8.0.3, 8.0.30, 8.0.31, 8.0.4, 8.0.5, 8.0.6, 8.0.7, 8.0.8
Microsoft.WindowsDesktop.App.Runtime.win-x86 NuGet
ECOSYSTEM · introduced 8.0.0 → fixed 8.0.32
31 explicitly affected versions 8.0.0, 8.0.1, 8.0.10, 8.0.11, 8.0.12, 8.0.13, 8.0.14, 8.0.15, 8.0.16, 8.0.17, 8.0.18, 8.0.19, 8.0.2, 8.0.20, 8.0.21, 8.0.22, 8.0.23, 8.0.24, 8.0.25, 8.0.26, 8.0.27, 8.0.28, 8.0.29, 8.0.3, 8.0.30, 8.0.31, 8.0.4, 8.0.5, 8.0.6, 8.0.7, 8.0.8
Original source record · Cite this exact observation · Complete original publisher JSON