CVE-2026-26171
Estado: ModificadaAlta (7.5)—
Uncontrolled resource consumption in .NET allows an unauthorized attacker to deny service over a network.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 7.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 2.26%
- Percentil entre todas las CVEs puntuadas: 82
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1190Exploit Public-Facing Applicationinitial access95 % - Impacto principal
T1499.004Application or System Exploitationimpact90 % - Impacto secundario
T1005Data from Local Systemcollection45 %
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N indica explotación remota sin privilegios (T1190). Impacto primario T1499.004 (DoS de aplicación) por 'uncontrolled resource consumption'; T1005 secundaria por acceso a datos potencial en .NET. CWE-611 (XXE) puede permitir lecturas, pero el texto solo garantiza de
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (2)
CWE
- CWE-400, CWE-611
- CWE-776
Referencias
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26171
- https://access.redhat.com/errata/RHSA-2026:13280
- https://access.redhat.com/errata/RHSA-2026:13281
- https://access.redhat.com/errata/RHSA-2026:13282
- https://access.redhat.com/errata/RHSA-2026:13283
- https://access.redhat.com/errata/RHSA-2026:13693
- https://access.redhat.com/errata/RHSA-2026:8467
- https://access.redhat.com/errata/RHSA-2026:8468
- https://access.redhat.com/errata/RHSA-2026:8469
- https://access.redhat.com/errata/RHSA-2026:8470
- https://access.redhat.com/errata/RHSA-2026:8471
- https://access.redhat.com/errata/RHSA-2026:8472
- https://access.redhat.com/errata/RHSA-2026:8473
- https://access.redhat.com/errata/RHSA-2026:8474
- https://access.redhat.com/errata/RHSA-2026:8475
- https://access.redhat.com/errata/RHSA-2026:9077
- https://access.redhat.com/errata/RHSA-2026:9080
- https://access.redhat.com/errata/RHSA-2026:9205
- https://access.redhat.com/security/cve/CVE-2026-26171
- https://bugzilla.redhat.com/show_bug.cgi?id=2457739
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-26171.json
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-26171",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-26171",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-04-14T18:53:29.483401Z"
}
}
],
"cvssMetricV31": [
{
"type": "Secondary",
"source": "secure@microsoft.com",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 7.5,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "NONE"
},
"impactScore": 3.6,
"exploitabilityScore": 3.9
},
{
"type": "Secondary",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 7.5,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "NONE"
},
"impactScore": 3.6,
"exploitabilityScore": 3.9
}
]
},
"affected": [
{
"source": "secure@microsoft.com",
"affectedData": [
{
"vendor": "Microsoft",
"product": ".NET 10.0",
"versions": [
{
"status": "affected",
"version": "10.0.0",
"lessThan": "10.0.6",
"versionType": "custom"
}
]
},
{
"vendor": "Microsoft",
"product": ".NET 8.0",
"versions": [
{
"status": "affected",
"version": "8.0.0",
"lessThan": "8.0.26",
"versionType": "custom"
}
]
},
{
"vendor": "Microsoft",
"product": ".NET 9.0",
"versions": [
{
"status": "affected",
"version": "9.0.0",
"lessThan": "9.0.15",
"versionType": "custom"
}
]
},
{
"vendor": "Microsoft",
"product": "PowerShell 7.5",
"versions": [
{
"status": "affected",
"version": "7.5.0",
"lessThan": "7.5.6",
"versionType": "custom"
}
]
},
{
"vendor": "Microsoft",
"product": "PowerShell 7.6",
"versions": [
{
"status": "affected",
"version": "7.6.0",
"lessThan": "7.6.1",
"versionType": "custom"
}
]
}
]
},
{
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
"affectedData": [
{
"cpes": [
"cpe:/o:redhat:enterprise_linux:10.1"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 10",
"versions": [
{
"status": "unaffected",
"version": "0:10.0.106-1.el10_1",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "dotnet10.0",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/o:redhat:enterprise_linux:10.1"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 10",
"versions": [
{
"status": "unaffected",
"version": "0:8.0.126-1.el10_1",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "dotnet8.0",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/o:redhat:enterprise_linux:10.1"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 10",
"versions": [
{
"status": "unaffected",
"version": "0:9.0.116-1.el10_1",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "dotnet9.0",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/o:redhat:enterprise_linux_eus:10.0"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 10.0 Extended Update Support",
"versions": [
{
"status": "unaffected",
"version": "0:9.0.116-1.el10_0",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "dotnet9.0",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/o:redhat:enterprise_linux_eus:10.0"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 10.0 Extended Update Support",
"versions": [
{
"status": "unaffected",
"version": "0:8.0.126-1.el10_0",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "dotnet8.0",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:enterprise_linux:8"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8",
"versions": [
{
"status": "unaffected",
"version": "0:8.0.126-1.el8_10",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "dotnet8.0",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:enterprise_linux:8"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8",
"versions": [
{
"status": "unaffected",
"version": "0:10.0.106-1.el8_10",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "dotnet10.0",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:enterprise_linux:8"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8",
"versions": [
{
"status": "unaffected",
"version": "0:9.0.116-1.el8_10",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "dotnet9.0",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:enterprise_linux:9"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9",
"versions": [
{
"status": "unaffected",
"version": "0:8.0.126-1.el9_7",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "dotnet8.0",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:enterprise_linux:9"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9",
"versions": [
{
"status": "unaffected",
"version": "0:10.0.106-1.el9_7",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "dotnet10.0",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:enterprise_linux:9"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9",
"versions": [
{
"status": "unaffected",
"version": "0:9.0.116-1.el9_7",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "dotnet9.0",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:rhel_eus:9.4"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9.4 Extended Update Support",
"versions": [
{
"status": "unaffected",
"version": "0:8.0.126-1.el9_4",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "dotnet8.0",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:rhel_eus:9.6"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9.6 Extended Update Support",
"versions": [
{
"status": "unaffected",
"version": "0:9.0.116-1.el9_6",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "dotnet9.0",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:rhel_eus:9.6"
],
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9.6 Extended Update Support",
"versions": [
{
"status": "unaffected",
"version": "0:8.0.126-1.el9_6",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "dotnet8.0",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:hummingbird:1"
],
"vendor": "Red Hat",
"product": "Red Hat Hardened Images",
"versions": [
{
"status": "unaffected",
"version": "10.0.106-1.hum1",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "dotnet10-0-main",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:hummingbird:1"
],
"vendor": "Red Hat",
"product": "Red Hat Hardened Images",
"versions": [
{
"status": "unaffected",
"version": "8.0.126-1.hum1",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "dotnet8-0-main",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:hummingbird:1"
],
"vendor": "Red Hat",
"product": "Red Hat Hardened Images",
"versions": [
{
"status": "unaffected",
"version": "9.0.116-1.hum1",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "dotnet9-0-main",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "affected"
}
]
}
],
"published": "2026-04-14T18:16:51.577",
"references": [
{
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26171",
"tags": [
"Vendor Advisory"
],
"source": "secure@microsoft.com"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:13280",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:13281",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:13282",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:13283",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:13693",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:8467",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:8468",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:8469",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:8470",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:8471",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:8472",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:8473",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:8474",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:8475",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:9077",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:9080",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:9205",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
},
{
"url": "https://access.redhat.com/security/cve/CVE-2026-26171",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2457739",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
},
{
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-26171.json",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Secondary",
"source": "secure@microsoft.com",
"description": [
{
"lang": "en",
"value": "CWE-400"
},
{
"lang": "en",
"value": "CWE-611"
}
]
},
{
"type": "Secondary",
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
"description": [
{
"lang": "en",
"value": "CWE-776"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Uncontrolled resource consumption in .NET allows an unauthorized attacker to deny service over a network."
}
],
"lastModified": "2026-07-15T02:19:00.690",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "CD89D801-933E-4D78-9187-D2CA94370FA0",
"versionEndExcluding": "10.0.6",
"versionStartIncluding": "10.0.0"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "703AF700-7A70-47E2-BC3A-7FD03B3CA9C1"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "CB15ABFB-047C-4B69-BD19-68D3EFEDCB78",
"versionEndExcluding": "8.0.26",
"versionStartIncluding": "8.0.0"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "703AF700-7A70-47E2-BC3A-7FD03B3CA9C1"
},
{
"criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "EB2D66A6-4F92-4AB0-A8F0-FCE4EC0BED1A",
"versionEndExcluding": "9.0.15",
"versionStartIncluding": "9.0.0"
}
],
"operator": "OR"
},
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "703AF700-7A70-47E2-BC3A-7FD03B3CA9C1"
},
{
"criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*",
"vulnerable": false,
"matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"
}
],
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:microsoft:powershell:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "2338A6B8-E136-4372-BB09-1721FCA0EE84",
"versionEndExcluding": "7.5.6",
"versionStartIncluding": "7.5"
},
{
"criteria": "cpe:2.3:a:microsoft:powershell:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "1B1F4EB9-7DC0-476E-992E-595E98AC8B5F",
"versionEndExcluding": "7.6.1",
"versionStartIncluding": "7.6"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "secure@microsoft.com"
}