{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-101986",
"assignerOrgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
"state": "PUBLISHED",
"assignerShortName": "juniper",
"dateReserved": "2026-09-28T16:31:35.504Z",
"datePublished": "2026-10-14T16:20:56.882Z",
"dateUpdated": "2026-10-15T03:57:22.964Z"
},
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Junos OS",
"vendor": "Juniper Networks",
"versions": [
{
"lessThan": "23.2R2-S7.7",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"lessThan": "23.4R2-S8.13",
"status": "affected",
"version": "23.4",
"versionType": "custom"
},
{
"lessThan": "24.2R2-S5.5",
"status": "affected",
"version": "24.2",
"versionType": "custom"
},
{
"lessThan": "24.4R2-S5",
"status": "affected",
"version": "24.4",
"versionType": "custom"
},
{
"lessThan": "25.2R2-S2",
"status": "affected",
"version": "25.2",
"versionType": "custom"
},
{
"lessThan": "25.4R1-S3",
"status": "affected",
"version": "25.4",
"versionType": "custom"
},
{
"lessThan": "26.2R1-S2",
"status": "affected",
"version": "26.2",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unaffected",
"product": "Junos OS Evolved",
"vendor": "Juniper Networks",
"versions": [
{
"lessThan": "23.2R2-S7.7-EVO",
"status": "affected",
"version": "0",
"versionType": "custom"
},
{
"lessThan": "23.4R2-S8.11-EVO",
"status": "affected",
"version": "23.4",
"versionType": "custom"
},
{
"lessThan": "24.2R2-S5.6-EVO",
"status": "affected",
"version": "24.2",
"versionType": "custom"
},
{
"lessThan": "24.4R2-S5-EVO",
"status": "affected",
"version": "24.4",
"versionType": "custom"
},
{
"lessThan": "25.2R2-S2-EVO",
"status": "affected",
"version": "25.2",
"versionType": "custom"
},
{
"lessThan": "25.4R1-S3-EVO",
"status": "affected",
"version": "25.4",
"versionType": "custom"
},
{
"lessThan": "26.2R1-S2-EVO",
"status": "affected",
"version": "26.2",
"versionType": "custom"
},
{
"status": "affected",
"version": "23.4X100",
"versionType": "custom"
},
{
"lessThan": "25.2X100-D35-EVO",
"status": "affected",
"version": "25.2X100",
"versionType": "custom"
},
{
"lessThan": "25.4X300-D40-EVO",
"status": "affected",
"version": "25.4X300",
"versionType": "custom"
}
]
}
],
"configurations": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "[ system services web-management ... ]
"
}
],
"value": "[ system services web-management ... ]"
}
],
"datePublic": "2026-10-14T16:00:00.000Z",
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "An Improper Authentication vulnerability in J-Web of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated network attacker to bypass J-Web authentication and execute CGI content with elevated privileges via a crafted HTTP request."
}
],
"value": "An Improper Authentication vulnerability in J-Web of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated network attacker to bypass J-Web authentication and execute CGI content with elevated privileges via a crafted HTTP request."
}
],
"exploits": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."
}
],
"value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
},
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 9.3,
"baseSeverity": "CRITICAL",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "LOW",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-287",
"description": "CWE-287 Improper Authentication",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"orgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
"shortName": "juniper",
"dateUpdated": "2026-10-14T16:20:56.882Z"
},
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://supportportal.juniper.net/JSA112187"
}
],
"solutions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": true,
"type": "text/html",
"value": "The following software releases have been updated to resolve this specific issue:
\n
\nJunos OS: 23.2R2-S7.7, 23.4R2-S8.13, 24.2R2-S5.5, 24.4R2-S5, 25.2R2-S2, 25.4R1-S3, 25.4R2, 26.2R1-S2, 26.2R2, 26.4R1, and all subsequent releases.
Junos OS Evolved: 23.2R2-S7.7-EVO, 23.4R2-S8.11-EVO, 24.2R2-S5.6-EVO, 24.4R2-S5-EVO, 25.2R2-S2-EVO, 25.2X100-D35-EVO, 25.4R1-S3-EVO, 25.4R2-EVO, 25.4X300-D40-EVO, 26.2R1-S2-EVO, 26.2R2-EVO, 26.4R1-EVO, and all subsequent releases.
Note: For Junos OS releases 23.2, 23.4, and 24.2, and Junos OS Evolved releases 23.2-EVO, 23.4-EVO, and 24.2-EVO, specific respins have been referenced. Previously published versions of these releases have been rebuilt to resolve the security vulnerabilities identified in this advisory."
}
],
"value": "The following software releases have been updated to resolve this specific issue:\n\n\n\nJunos OS: 23.2R2-S7.7, 23.4R2-S8.13, 24.2R2-S5.5, 24.4R2-S5, 25.2R2-S2, 25.4R1-S3, 25.4R2, 26.2R1-S2, 26.2R2, 26.4R1, and all subsequent releases.\n\nJunos OS Evolved: 23.2R2-S7.7-EVO, 23.4R2-S8.11-EVO, 24.2R2-S5.6-EVO, 24.4R2-S5-EVO, 25.2R2-S2-EVO, 25.2X100-D35-EVO, 25.4R1-S3-EVO, 25.4R2-EVO, 25.4X300-D40-EVO, 26.2R1-S2-EVO, 26.2R2-EVO, 26.4R1-EVO, and all subsequent releases.\n\nNote: For Junos OS releases 23.2, 23.4, and 24.2, and Junos OS Evolved releases 23.2-EVO, 23.4-EVO, and 24.2-EVO, specific respins have been referenced. Previously published versions of these releases have been rebuilt to resolve the security vulnerabilities identified in this advisory."
}
],
"source": {
"advisory": "JSA112187",
"defect": [
"1954503"
],
"discovery": "INTERNAL"
},
"title": "Junos OS and Junos OS Evolved: J-Web permits pre-authentication CGI execution",
"workarounds": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "There are no known workarounds for this issue."
}
],
"value": "There are no known workarounds for this issue."
}
],
"x_generator": {
"engine": "Vulnogram 0.1.0-dev"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-10-14T00:00:00+00:00",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3",
"id": "CVE-2026-101986"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-10-15T03:57:22.964Z"
}
}
]
}
}