FKIE_CVE-2026-33778

Vulnerability from fkie_nvd - Published: 2026-04-09 22:16 - Updated: 2026-04-17 17:23
Summary
An Improper Validation of Syntactic Correctness of Input vulnerability in the IPsec library used by kmd and iked of Juniper Networks Junos OS on SRX Series and MX Series allows an unauthenticated, network-based attacker to cause a complete Denial-of-Service (DoS). If an affected device receives a specifically malformed first ISAKMP packet from the initiator, the kmd/iked process will crash and restart, which momentarily prevents new security associations (SAs) for from being established. Repeated exploitation of this vulnerability causes a complete inability to establish new VPN connections. This issue affects Junos OS on SRX Series and MX Series: * all versions before 22.4R3-S9, * 23.2 version before 23.2R2-S6, * 23.4 version before 23.4R2-S7, * 24.2 versions before 24.2R2-S4, * 24.4 versions before 24.4R2-S3, * 25.2 versions before 25.2R1-S2, 25.2R2.
References
Impacted products
Vendor Product Version
juniper junos *
juniper junos 22.4
juniper junos 22.4
juniper junos 22.4
juniper junos 22.4
juniper junos 22.4
juniper junos 22.4
juniper junos 22.4
juniper junos 22.4
juniper junos 22.4
juniper junos 22.4
juniper junos 22.4
juniper junos 22.4
juniper junos 22.4
juniper junos 22.4
juniper junos 22.4
juniper junos 22.4
juniper junos 23.2
juniper junos 23.2
juniper junos 23.2
juniper junos 23.2
juniper junos 23.2
juniper junos 23.2
juniper junos 23.2
juniper junos 23.2
juniper junos 23.2
juniper junos 23.2
juniper junos 23.4
juniper junos 23.4
juniper junos 23.4
juniper junos 23.4
juniper junos 23.4
juniper junos 23.4
juniper junos 23.4
juniper junos 23.4
juniper junos 23.4
juniper junos 23.4
juniper junos 23.4
juniper junos 24.2
juniper junos 24.2
juniper junos 24.2
juniper junos 24.2
juniper junos 24.2
juniper junos 24.2
juniper junos 24.2
juniper junos 24.2
juniper junos 24.4
juniper junos 24.4
juniper junos 24.4
juniper junos 24.4
juniper junos 24.4
juniper junos 24.4
juniper junos 24.4
juniper junos 25.2
juniper junos 25.2
juniper junos 25.2
juniper junos 25.2
juniper mx10004 -
juniper mx10008 -
juniper mx2008 -
juniper mx2010 -
juniper mx2020 -
juniper mx204 -
juniper mx240 -
juniper mx301 -
juniper mx304 -
juniper mx480 -
juniper mx960 -
juniper srx1500 -
juniper srx1600 -
juniper srx2300 -
juniper srx300 -
juniper srx320 -
juniper srx340 -
juniper srx345 -
juniper srx380 -
juniper srx4100 -
juniper srx4120 -
juniper srx4200 -
juniper srx4300 -
juniper srx4600 -
juniper srx4700 -
juniper srx5400 -
juniper srx5600 -
juniper srx5800 -

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              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx4120:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "E5942B6E-AFC7-40E4-8007-68C804BD52E3",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx4200:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "CCC5F6F5-4347-49D3-909A-27A3A96D36C9",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx4300:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "826F893F-7B06-43B5-8653-A8D9794C052E",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx4600:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "56BA6B86-D3F4-4496-AE46-AC513C6560FA",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx4700:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "462CFD52-D3E2-4F7A-98AC-C589D2420556",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx5400:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "2FDDC897-747F-44DD-9599-7266F9B5B7B1",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx5600:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "68CA098D-CBE4-4E62-9EC0-43E1B6098710",
              "vulnerable": false
            },
            {
              "criteria": "cpe:2.3:h:juniper:srx5800:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "66F474D4-79B6-4525-983C-9A9011BD958B",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An Improper Validation of Syntactic Correctness of Input vulnerability in the  IPsec library used by kmd and iked of Juniper Networks Junos OS on SRX Series and MX Series allows an unauthenticated, network-based attacker to cause a complete Denial-of-Service (DoS).\n\nIf an affected device receives a specifically malformed first ISAKMP packet from the initiator, the kmd/iked process will crash and restart, which momentarily prevents new security associations (SAs) for from being established. Repeated exploitation of this vulnerability causes a complete inability to establish new VPN connections.\n\nThis issue affects Junos OS on \n\nSRX Series and MX Series:\n\n\n\n  *  all versions before 22.4R3-S9,\n  *  23.2 version before 23.2R2-S6,\n  *  23.4 version before 23.4R2-S7,\n  *  24.2 versions before 24.2R2-S4,\n  *  24.4 versions before 24.4R2-S3,\n  *  25.2 versions before 25.2R1-S2, 25.2R2."
    }
  ],
  "id": "CVE-2026-33778",
  "lastModified": "2026-04-17T17:23:59.233",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "sirt@juniper.net",
        "type": "Primary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "YES",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 8.7,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "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: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:X/V:X/RE:M/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "MODERATE"
        },
        "source": "sirt@juniper.net",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-04-09T22:16:26.500",
  "references": [
    {
      "source": "sirt@juniper.net",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://kb.juniper.net/JSA107868"
    }
  ],
  "sourceIdentifier": "sirt@juniper.net",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-1286"
        }
      ],
      "source": "sirt@juniper.net",
      "type": "Primary"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.


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Detection rules are retrieved from Rulezet.

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