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CVE-2018-8926

Status: ModifiedHigh (8.8)—

Permissive regular expression vulnerability in synophoto_dsm_user in Synology Photo Station before 6.8.5-3471 and before 6.3-2975 allows remote authenticated users to conduct privilege escalation attacks via the fullname parameter.

CVSS

Exploitation probability (EPSS)

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)

Synology — Photo Station

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2018-8926",
  "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
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Secondary",
        "source": "security@synology.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 8.8,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.0/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
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 8.8,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.0/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": "security@synology.com",
      "affectedData": [
        {
          "vendor": "Synology",
          "product": "Photo Station",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified",
              "lessThan": "6.8.5-3471",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "unspecified",
              "lessThan": "6.3-2975",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2018-06-08T13:29:01.470",
  "references": [
    {
      "url": "https://www.synology.com/zh-tw/support/security/Synology_SA_18_15",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "security@synology.com"
    },
    {
      "url": "https://www.synology.com/zh-tw/support/security/Synology_SA_18_15",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@synology.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-625"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Permissive regular expression vulnerability in synophoto_dsm_user in Synology Photo Station before 6.8.5-3471 and before 6.3-2975 allows remote authenticated users to conduct privilege escalation attacks via the fullname parameter."
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad de expresión regular permisiva en synophoto_dsm_user en SYNOPHOTO_Flickr_MultiUpload en Synology Photo Station, en versiones anteriores a la 6.8.5-3471 y a la 6.3-2975, permite que usuarios autenticados remotos lleven a cabo ataques de escalado de privilegios mediante el parámetro fullname."
    }
  ],
  "lastModified": "2026-06-17T02:05:39.947",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:synology:photo_station:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "CBF9F4EA-7FB0-4C8C-BC49-6AB435E89341",
              "versionEndIncluding": "6.3-2975",
              "versionStartIncluding": "6.3-2958"
            },
            {
              "criteria": "cpe:2.3:a:synology:photo_station:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "AB7E17E9-519F-4E9E-BD76-C469929B3D13",
              "versionEndExcluding": "6.8.5-3471",
              "versionStartIncluding": "6.8.0-3456"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security@synology.com"
}