CVE-2021-35217
Status: ModifiedHigh (8.8)—
Insecure Deseralization of untrusted data remote code execution vulnerability was discovered in Patch Manager Orion Platform Integration module and reported to us by ZDI. An Authenticated Attacker could exploit it by executing WSAsyncExecuteTasks deserialization of untrusted data.
CVSS
- Version: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Base score: 8.8
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days: 73%
- Percentile among all scored CVEs: 99
- Score date: 10/6/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
Affected technologies (1)
CWEs
- CWE-502
References
- https://documentation.solarwinds.com/en/success_center/orionplatform/content/core-secure-configuration.htm
- https://documentation.solarwinds.com/en/success_center/orionplatform/content/release_notes/orion_platform_2020-2-6_release_notes.htm
- https://www.solarwinds.com/trust-center/security-advisories/cve-2021-35217
- https://www.zerodayinitiative.com/advisories/ZDI-21-1247/
- https://documentation.solarwinds.com/en/success_center/orionplatform/content/core-secure-configuration.htm
- https://documentation.solarwinds.com/en/success_center/orionplatform/content/release_notes/orion_platform_2020-2-6_release_notes.htm
- https://www.solarwinds.com/trust-center/security-advisories/cve-2021-35217
- https://www.zerodayinitiative.com/advisories/ZDI-21-1247/
Raw JSON (NVD)
Show
{
"id": "CVE-2021-35217",
"cveTags": [],
"metrics": {
"cvssMetricV2": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"version": "2.0",
"baseScore": 6.5,
"accessVector": "NETWORK",
"vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P",
"authentication": "SINGLE",
"integrityImpact": "PARTIAL",
"accessComplexity": "LOW",
"availabilityImpact": "PARTIAL",
"confidentialityImpact": "PARTIAL"
},
"acInsufInfo": false,
"impactScore": 6.4,
"baseSeverity": "MEDIUM",
"obtainAllPrivilege": false,
"exploitabilityScore": 8,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"type": "Secondary",
"source": "psirt@solarwinds.com",
"cvssData": {
"scope": "CHANGED",
"version": "3.1",
"baseScore": 8.9,
"attackVector": "ADJACENT_NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "LOW",
"privilegesRequired": "LOW",
"confidentialityImpact": "HIGH"
},
"impactScore": 6,
"exploitabilityScore": 2.3
},
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 8.8,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 2.8
}
]
},
"affected": [
{
"source": "psirt@solarwinds.com",
"affectedData": [
{
"vendor": "SolarWinds",
"product": "Orion Platform",
"versions": [
{
"status": "affected",
"version": "2020.2.5 and previous versions",
"lessThan": "2020.2.6",
"versionType": "custom"
}
]
}
]
}
],
"published": "2021-09-08T14:15:12.117",
"references": [
{
"url": "https://documentation.solarwinds.com/en/success_center/orionplatform/content/core-secure-configuration.htm",
"tags": [
"Vendor Advisory"
],
"source": "psirt@solarwinds.com"
},
{
"url": "https://documentation.solarwinds.com/en/success_center/orionplatform/content/release_notes/orion_platform_2020-2-6_release_notes.htm",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"source": "psirt@solarwinds.com"
},
{
"url": "https://www.solarwinds.com/trust-center/security-advisories/cve-2021-35217",
"tags": [
"Vendor Advisory"
],
"source": "psirt@solarwinds.com"
},
{
"url": "https://www.zerodayinitiative.com/advisories/ZDI-21-1247/",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"source": "psirt@solarwinds.com"
},
{
"url": "https://documentation.solarwinds.com/en/success_center/orionplatform/content/core-secure-configuration.htm",
"tags": [
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://documentation.solarwinds.com/en/success_center/orionplatform/content/release_notes/orion_platform_2020-2-6_release_notes.htm",
"tags": [
"Release Notes",
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://www.solarwinds.com/trust-center/security-advisories/cve-2021-35217",
"tags": [
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://www.zerodayinitiative.com/advisories/ZDI-21-1247/",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-502"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Insecure Deseralization of untrusted data remote code execution vulnerability was discovered in Patch Manager Orion Platform Integration module and reported to us by ZDI. An Authenticated Attacker could exploit it by executing WSAsyncExecuteTasks deserialization of untrusted data."
},
{
"lang": "es",
"value": "Se ha detectado una vulnerabilidad de ejecución de código remota en una Deserialización de datos no confiables en el módulo de integración de la plataforma Orion de Patch Manager y nos fue reportada por ZDI. Un atacante autenticado podría explotarla al ejecutar la deserialización de datos no confiables de WSAsyncExecuteTasks"
}
],
"lastModified": "2026-06-17T03:57:19.210",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:solarwinds:patch_manager:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "C22D4A7B-2EC9-4BCE-A862-F58DF5994A0C",
"versionEndIncluding": "2020.2.5"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "psirt@solarwinds.com"
}