CVE-2026-101999

Status: Awaiting AnalysisHigh (7.1)—

Severity7.1High · CVSS 4.0

Exploitation probability0.27 %higher than 18% of CVEs

Active exploitationNonot in the CISA catalog

Public exploitNot knownno public code found

A Reachable Assertion vulnerability in the rpd process of Juniper Networks Junos OS and Junos EVO allows an adjacent attacker to cause a denial of service via an established LDP session carrying an IPv6 Prefix FEC in a specific Label message.

CVSS

Base score: 7.1
Version: 4.0
Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:A/V:C/RE:M/U:X

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.27 %
Percentile among all scored CVEs: 18
Score date: 10/20/2026

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).

ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1210 Exploitation of Remote Serviceslateral movement90 %
Primary impactT1499 Endpoint Denial of Serviceimpact90 %

CVSS AV:A/PR:N/UI:N indica red adyacente sin privilegios; el texto describe una aserción alcanzable en rpd que provoca denegación de servicio mediante un mensaje LDP con FEC de prefijo IPv6.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

ATT&CK mitigations that cover these techniques

Vulnerability Scanning Threat Intelligence Program Privileged Account Management Network Segmentation Filter Network Traffic Disable or Remove Feature or Program

Affected technologies (2)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Juniper — Junos EVO^AI Juniper — Junos OS^AI

CWEs

CWE-617

References

Show 1 references

https://supportportal.juniper.net/JSA112187

Raw JSON (NVD)

Show

{
  "id": "CVE-2026-101999",
  "cveTags": [],
  "metrics": {
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          "options": [
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          "version": "2.0.3",
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          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
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          "modifiedUserInteraction": "NOT_DEFINED",
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          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "MODERATE",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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  "published": "2026-10-14T17:17:52.893",
  "references": [
    {
      "url": "https://supportportal.juniper.net/JSA112187",
      "source": "sirt@juniper.net"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
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      "source": "sirt@juniper.net",
      "description": [
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      "value": "A Reachable Assertion vulnerability in the rpd process of Juniper Networks Junos OS and Junos EVO allows an adjacent attacker to cause a denial of service via an established LDP session carrying an IPv6 Prefix FEC in a specific Label message."
    }
  ],
  "lastModified": "2026-10-15T16:23:06.250",
  "sourceIdentifier": "sirt@juniper.net"
}