CVE-2026-32226 (GCVE-0-2026-32226)
Vulnerability from cvelistv5 – Published: 2026-04-14 16:57 – Updated: 2026-06-19 16:09
VLAI?
Title
.NET Framework Denial of Service Vulnerability
Summary
Concurrent execution using shared resource with improper synchronization ('race condition') in .NET Framework allows an unauthorized attacker to deny service over a network.
Severity ?
CWE
- CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | |||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Microsoft | Microsoft .NET Framework 3.5 |
Affected:
3.5.0 , < 2.0.50727.8982 & 3.0.30729.8976
(custom)
|
|||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-32226",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-04-14T19:03:36.736622Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-04-14T19:20:32.328Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"platforms": [
"Windows Server 2012",
"Windows Server 2012 (Server Core installation)",
"Windows Server 2012 R2",
"Windows Server 2012 R2 (Server Core installation)"
],
"product": "Microsoft .NET Framework 3.5",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "2.0.50727.8982 \u0026 3.0.30729.8976",
"status": "affected",
"version": "3.5.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"Windows 10 Version 1809 for 32-bit Systems",
"Windows 10 Version 1809 for ARM64-based Systems",
"Windows 10 Version 1809 for x64-based Systems"
],
"product": "Microsoft .NET Framework 3.5 AND 4.7.2",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "2.0.50727.9068 \u0026 3.0.30729.9065 \u0026 4.7.4141.0",
"status": "affected",
"version": "4.7.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"Windows 10 Version 1809 for 32-bit Systems",
"Windows 10 Version 1809 for ARM64-based Systems",
"Windows 10 Version 1809 for x64-based Systems",
"Windows 10 Version 21H2 for 32-bit Systems",
"Windows 10 Version 21H2 for ARM64-based Systems",
"Windows 10 Version 21H2 for x64-based Systems",
"Windows 10 Version 22H2 for 32-bit Systems",
"Windows 10 Version 22H2 for ARM64-based Systems",
"Windows 10 Version 22H2 for x64-based Systems",
"Windows 11 version 21H2 for x64-based Systems",
"Windows Server 2022",
"Windows Server 2022 (Server Core installation)",
"Windows Server, version 20H2 (Server Core Installation)"
],
"product": "Microsoft .NET Framework 3.5 AND 4.8",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "2.0.50727.9068 \u0026 3.0.30729.9065 \u0026 4.8.4801.0",
"status": "affected",
"version": "4.8.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"Windows 10 Version 21H2 for 32-bit Systems",
"Windows 10 Version 21H2 for ARM64-based Systems",
"Windows 10 Version 21H2 for x64-based Systems",
"Windows 10 Version 22H2 for 32-bit Systems",
"Windows 10 Version 22H2 for ARM64-based Systems",
"Windows 10 Version 22H2 for x64-based Systems",
"Windows 11 Version 22H2 for ARM64-based Systems",
"Windows 11 Version 22H2 for x64-based Systems",
"Windows 11 Version 23H2 for ARM64-based Systems",
"Windows 11 Version 23H2 for x64-based Systems",
"Windows 11 Version 24H2 for ARM64-based Systems",
"Windows 11 Version 24H2 for x64-based Systems",
"Windows 11 Version 25H2 for ARM64-based Systems",
"Windows 11 Version 25H2 for x64-based Systems",
"Windows 11 Version 26H1 for ARM64-based Systems",
"Windows 11 version 26H1 for x64-based Systems",
"Windows Server 2022",
"Windows Server 2022 (Server Core installation)",
"Windows Server 2022, 23H2 Edition (Server Core installation)",
"Windows Server 2025",
"Windows Server 2025 (Server Core installation)"
],
"product": "Microsoft .NET Framework 3.5 AND 4.8.1",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "2.0.50727.9181 \u0026 3.0.30729.9165 \u0026 4.8.9332.0",
"status": "affected",
"version": "4.8.1",
"versionType": "custom"
}
]
},
{
"platforms": [
"Windows Server 2012",
"Windows Server 2012 (Server Core installation)",
"Windows Server 2012 R2",
"Windows Server 2012 R2 (Server Core installation)"
],
"product": "Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "4.8.4801.0",
"status": "affected",
"version": "4.7.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"Windows 10 Version 1809 for 32-bit Systems",
"Windows 10 Version 1809 for ARM64-based Systems",
"Windows 10 Version 1809 for x64-based Systems"
],
"product": "Microsoft .NET Framework 4.7.2",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "2.0.50727.9068 \u0026 3.0.30729.9065 \u0026 4.7.4141.0",
"status": "affected",
"version": "10.0.0.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"Windows 10 Version 1607 for x64-based Systems",
"Windows 10 Version 22H2 for x64-based Systems",
"Windows 11 Version 22H2 for x64-based Systems",
"Windows Server 2012 (Server Core installation)",
"Windows Server 2012 R2",
"Windows Server 2012 R2 (Server Core installation)"
],
"product": "Microsoft .NET Framework 4.8",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "2.0.50727.9181 \u0026 3.0.30729.9165 \u0026 4.8.4801.0",
"status": "affected",
"version": "4.8.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"Windows Server 2022 (Server Core installation)"
],
"product": "Microsoft .NET Framework 4.8.1",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "2.0.50727.9181 \u0026 3.0.30729.9165 \u0026 4.8.9332.0",
"status": "affected",
"version": "4.8.0.0",
"versionType": "custom"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.0.50727.9181 \u0026 3.0.30729.9165 \u0026 4.8.4801.0",
"versionStartIncluding": "4.8.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.0.50727.9068 \u0026 3.0.30729.9065 \u0026 4.8.4801.0",
"versionStartIncluding": "4.8.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.0.50727.9068 \u0026 3.0.30729.9065 \u0026 4.7.4141.0",
"versionStartIncluding": "4.7.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:.net_framework:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.0.50727.9068 \u0026 3.0.30729.9065 \u0026 4.7.4141.0",
"versionStartIncluding": "10.0.0.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:.net_framework:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.0.50727.9181 \u0026 3.0.30729.9165 \u0026 4.8.9332.0",
"versionStartIncluding": "4.8.0.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.0.50727.9181 \u0026 3.0.30729.9165 \u0026 4.8.9332.0",
"versionStartIncluding": "4.8.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.0.50727.8982 \u0026 3.0.30729.8976",
"versionStartIncluding": "3.5.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
"versionEndExcluding": "4.8.4801.0",
"versionStartIncluding": "4.7.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"datePublic": "2026-04-14T14:00:00.000Z",
"descriptions": [
{
"lang": "en-US",
"value": "Concurrent execution using shared resource with improper synchronization (\u0027race condition\u0027) in .NET Framework allows an unauthorized attacker to deny service over a network."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en-US",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-362",
"description": "CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)",
"lang": "en-US",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-19T16:09:07.114Z",
"orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
"shortName": "microsoft"
},
"references": [
{
"name": ".NET Framework Denial of Service Vulnerability",
"tags": [
"vendor-advisory",
"patch"
],
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32226"
}
],
"title": ".NET Framework Denial of Service Vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
"assignerShortName": "microsoft",
"cveId": "CVE-2026-32226",
"datePublished": "2026-04-14T16:57:44.474Z",
"dateReserved": "2026-03-11T01:49:58.662Z",
"dateUpdated": "2026-06-19T16:09:07.114Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-32226\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-04-14T19:03:36.736622Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-04-14T19:03:37.746Z\"}}], \"cna\": {\"title\": \".NET Framework Denial of Service Vulnerability\", \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 5.9, \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C\"}, \"scenarios\": [{\"lang\": \"en-US\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"Microsoft\", \"product\": \"Microsoft .NET Framework 3.5\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.5.0\", \"lessThan\": \"2.0.50727.8982 \u0026 3.0.30729.8976\", \"versionType\": \"custom\"}], \"platforms\": [\"Windows Server 2012\", \"Windows Server 2012 (Server Core installation)\", \"Windows Server 2012 R2\", \"Windows Server 2012 R2 (Server Core installation)\"]}, {\"vendor\": \"Microsoft\", \"product\": \"Microsoft .NET Framework 3.5 AND 4.7.2\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.7.0\", \"lessThan\": \"2.0.50727.9068 \u0026 3.0.30729.9065 \u0026 4.7.4141.0\", \"versionType\": \"custom\"}], \"platforms\": [\"Windows 10 Version 1809 for 32-bit Systems\", \"Windows 10 Version 1809 for ARM64-based Systems\", \"Windows 10 Version 1809 for x64-based Systems\"]}, {\"vendor\": \"Microsoft\", \"product\": \"Microsoft .NET Framework 3.5 AND 4.8\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.8.0\", \"lessThan\": \"2.0.50727.9068 \u0026 3.0.30729.9065 \u0026 4.8.4801.0\", \"versionType\": \"custom\"}], \"platforms\": [\"Windows 10 Version 1809 for 32-bit Systems\", \"Windows 10 Version 1809 for ARM64-based Systems\", \"Windows 10 Version 1809 for x64-based Systems\", \"Windows 10 Version 21H2 for 32-bit Systems\", \"Windows 10 Version 21H2 for ARM64-based Systems\", \"Windows 10 Version 21H2 for x64-based Systems\", \"Windows 10 Version 22H2 for 32-bit Systems\", \"Windows 10 Version 22H2 for ARM64-based Systems\", \"Windows 10 Version 22H2 for x64-based Systems\", \"Windows 11 version 21H2 for x64-based Systems\", \"Windows Server 2022\", \"Windows Server 2022 (Server Core installation)\", \"Windows Server, version 20H2 (Server Core Installation)\"]}, {\"vendor\": \"Microsoft\", \"product\": \"Microsoft .NET Framework 3.5 AND 4.8.1\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.8.1\", \"lessThan\": \"2.0.50727.9181 \u0026 3.0.30729.9165 \u0026 4.8.9332.0\", \"versionType\": \"custom\"}], \"platforms\": [\"Windows 10 Version 21H2 for 32-bit Systems\", \"Windows 10 Version 21H2 for ARM64-based Systems\", \"Windows 10 Version 21H2 for x64-based Systems\", \"Windows 10 Version 22H2 for 32-bit Systems\", \"Windows 10 Version 22H2 for ARM64-based Systems\", \"Windows 10 Version 22H2 for x64-based Systems\", \"Windows 11 Version 22H2 for ARM64-based Systems\", \"Windows 11 Version 22H2 for x64-based Systems\", \"Windows 11 Version 23H2 for ARM64-based Systems\", \"Windows 11 Version 23H2 for x64-based Systems\", \"Windows 11 Version 24H2 for ARM64-based Systems\", \"Windows 11 Version 24H2 for x64-based Systems\", \"Windows 11 Version 25H2 for ARM64-based Systems\", \"Windows 11 Version 25H2 for x64-based Systems\", \"Windows 11 Version 26H1 for ARM64-based Systems\", \"Windows 11 version 26H1 for x64-based Systems\", \"Windows Server 2022\", \"Windows Server 2022 (Server Core installation)\", \"Windows Server 2022, 23H2 Edition (Server Core installation)\", \"Windows Server 2025\", \"Windows Server 2025 (Server Core installation)\"]}, {\"vendor\": \"Microsoft\", \"product\": \"Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.7.0\", \"lessThan\": \"4.8.4801.0\", \"versionType\": \"custom\"}], \"platforms\": [\"Windows Server 2012\", \"Windows Server 2012 (Server Core installation)\", \"Windows Server 2012 R2\", \"Windows Server 2012 R2 (Server Core installation)\"]}, {\"vendor\": \"Microsoft\", \"product\": \"Microsoft .NET Framework 4.7.2\", \"versions\": [{\"status\": \"affected\", \"version\": \"10.0.0.0\", \"lessThan\": \"2.0.50727.9068 \u0026 3.0.30729.9065 \u0026 4.7.4141.0\", \"versionType\": \"custom\"}], \"platforms\": [\"Windows 10 Version 1809 for 32-bit Systems\", \"Windows 10 Version 1809 for ARM64-based Systems\", \"Windows 10 Version 1809 for x64-based Systems\"]}, {\"vendor\": \"Microsoft\", \"product\": \"Microsoft .NET Framework 4.8\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.8.0\", \"lessThan\": \"2.0.50727.9181 \u0026 3.0.30729.9165 \u0026 4.8.4801.0\", \"versionType\": \"custom\"}], \"platforms\": [\"Windows 10 Version 1607 for x64-based Systems\", \"Windows 10 Version 22H2 for x64-based Systems\", \"Windows 11 Version 22H2 for x64-based Systems\", \"Windows Server 2012 (Server Core installation)\", \"Windows Server 2012 R2\", \"Windows Server 2012 R2 (Server Core installation)\"]}, {\"vendor\": \"Microsoft\", \"product\": \"Microsoft .NET Framework 4.8.1\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.8.0.0\", \"lessThan\": \"2.0.50727.9181 \u0026 3.0.30729.9165 \u0026 4.8.9332.0\", \"versionType\": \"custom\"}], \"platforms\": [\"Windows Server 2022 (Server Core installation)\"]}], \"datePublic\": \"2026-04-14T14:00:00.000Z\", \"references\": [{\"url\": \"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32226\", \"name\": \".NET Framework Denial of Service Vulnerability\", \"tags\": [\"vendor-advisory\", \"patch\"]}], \"descriptions\": [{\"lang\": \"en-US\", \"value\": \"Concurrent execution using shared resource with improper synchronization (\u0027race condition\u0027) in .NET Framework allows an unauthorized attacker to deny service over a network.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en-US\", \"type\": \"CWE\", \"cweId\": \"CWE-362\", \"description\": \"CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"2.0.50727.9181 \u0026 3.0.30729.9165 \u0026 4.8.4801.0\", \"versionStartIncluding\": \"4.8.0\"}, {\"criteria\": \"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"2.0.50727.9068 \u0026 3.0.30729.9065 \u0026 4.8.4801.0\", \"versionStartIncluding\": \"4.8.0\"}, {\"criteria\": \"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"2.0.50727.9068 \u0026 3.0.30729.9065 \u0026 4.7.4141.0\", \"versionStartIncluding\": \"4.7.0\"}, {\"criteria\": \"cpe:2.3:a:microsoft:.net_framework:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"2.0.50727.9068 \u0026 3.0.30729.9065 \u0026 4.7.4141.0\", \"versionStartIncluding\": \"10.0.0.0\"}, {\"criteria\": \"cpe:2.3:a:microsoft:.net_framework:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"2.0.50727.9181 \u0026 3.0.30729.9165 \u0026 4.8.9332.0\", \"versionStartIncluding\": \"4.8.0.0\"}, {\"criteria\": \"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"2.0.50727.9181 \u0026 3.0.30729.9165 \u0026 4.8.9332.0\", \"versionStartIncluding\": \"4.8.1\"}, {\"criteria\": \"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"2.0.50727.8982 \u0026 3.0.30729.8976\", \"versionStartIncluding\": \"3.5.0\"}, {\"criteria\": \"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.8.4801.0\", \"versionStartIncluding\": \"4.7.0\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"f38d906d-7342-40ea-92c1-6c4a2c6478c8\", \"shortName\": \"microsoft\", \"dateUpdated\": \"2026-06-19T16:09:07.114Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-32226\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-06-19T16:09:07.114Z\", \"dateReserved\": \"2026-03-11T01:49:58.662Z\", \"assignerOrgId\": \"f38d906d-7342-40ea-92c1-6c4a2c6478c8\", \"datePublished\": \"2026-04-14T16:57:44.474Z\", \"assignerShortName\": \"microsoft\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
Loading…