CVE-2026-25657

{
  "id": "CVE-2026-25657",
  "sourceIdentifier": "85b1779b-6ecd-4f52-bcc5-73eac4659dcf",
  "published": "2026-06-05T12:16:37.750",
  "lastModified": "2026-10-26T11:10:00.157",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Ericsson Packet Core Gateway (PCG) versions prior to 1.30 contain an Improper Handling of Syntactically Invalid Structure (CWE-228) vulnerability where an attacker continuously sending a specially crafted message can cause service degradation. The impact continues as long the attack persists but the system recovers from the crashes when the attack stops."
    },
    {
      "lang": "es",
      "value": "Versiones de Ericsson Packet Core Gateway (PCG) anteriores a la 1.30 contienen una vulnerabilidad de Manejo Inadecuado de Estructura Sintácticamente Inválida (CWE-228) donde un atacante que envía continuamente un mensaje especialmente diseñado puede causar degradación del servicio. El impacto continúa mientras el ataque persista, pero el sistema se recupera de las caídas cuando el ataque cesa."
    }
  ],
  "affected": [
    {
      "source": "85b1779b-6ecd-4f52-bcc5-73eac4659dcf",
      "affectedData": [
        {
          "vendor": "Ericsson",
          "product": "Packet Core Gateway (PCG)",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "0",
              "lessThan": "1.30",
              "versionType": "1.30",
              "status": "affected",
              "changes": [
                {
                  "at": "1.30",
                  "status": "unaffected"
                }
              ]
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV40": [
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        "source": "85b1779b-6ecd-4f52-bcc5-73eac4659dcf",
        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
          "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/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:X/R:X/V:X/RE:X/U:X",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "attackVector": "ADJACENT",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnAvailabilityImpact": "HIGH",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "subAvailabilityImpact": "NONE",
          "exploitMaturity": "NOT_DEFINED",
          "confidentialityRequirement": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "valueDensity": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Primary",
        "cvssData": {
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          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "ADJACENT_NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-06-05T20:11:51.419993Z",
          "id": "CVE-2026-25657",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "85b1779b-6ecd-4f52-bcc5-73eac4659dcf",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-228"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:ericsson:packet_core_gateway:*:*:*:*:*:*:*:*",
              "versionEndExcluding": "1.30",
              "matchCriteriaId": "A22CA693-31C9-4C56-B9F8-DF577769D499"
            }
          ]
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      ]
    }
  ],
  "references": [
    {
      "url": "https://www.ericsson.com/en/about-us/security/psirt/cve-2026-25657",
      "source": "85b1779b-6ecd-4f52-bcc5-73eac4659dcf",
      "tags": [
        "Vendor Advisory"
      ]
    }
  ]
}