CVE-2013-6955

Status: ModifiedHigh (10)—💥 Exploit

webman/imageSelector.cgi in Synology DiskStation Manager (DSM) 4.0 before 4.0-2259, 4.2 before 4.2-3243, and 4.3 before 4.3-3810 Update 1 allows remote attackers to append data to arbitrary files, and consequently execute arbitrary code, via a pathname in the SLICEUPLOAD X-TMP-FILE HTTP header.

CVSS

Version: 2.0
Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C
Base score: 10

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 85%
Percentile among all scored CVEs: 100
Score date: 10/6/2026

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).

💥 Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

Metasploit module (reliable, widely available exploit) · Synology DiskStation Manager SLICEUPLOAD Remote Command Execution
Published on Exploit-DB · Synology DiskStation Manager - SLICEUPLOAD Remote Command Execution (Metasploit) (12/24/2013)

Affected technologies (1)

Synology — Diskstation Manager

CWEs

CWE-264

References

Raw JSON (NVD)

Show

{
  "id": "CVE-2013-6955",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 10,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 10,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "cret@cert.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2014-01-09T18:07:04.033",
  "references": [
    {
      "url": "http://www.kb.cert.org/vuls/id/615910",
      "tags": [
        "US Government Resource"
      ],
      "source": "cret@cert.org"
    },
    {
      "url": "http://www.kb.cert.org/vuls/id/615910",
      "tags": [
        "US Government Resource"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-264"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "webman/imageSelector.cgi in Synology DiskStation Manager (DSM) 4.0 before 4.0-2259, 4.2 before 4.2-3243, and 4.3 before 4.3-3810 Update 1 allows remote attackers to append data to arbitrary files, and consequently execute arbitrary code, via a pathname in the SLICEUPLOAD X-TMP-FILE HTTP header."
    },
    {
      "lang": "es",
      "value": "webman/imageSelector.cgi en Synology DiskStation Manager (DSM) 4.0 anteriores a 4.0-2259, 4.2 anteriores a 4.2-3243, y 4.3 anteriores 4.3-3810 Update permite a atacantes remotos añadir información a archivos de forma arbitraria, y consecuentemente ejecutar código de forma arbitraria, a través de una ruta en el header HTTP  SLICEUPLOAD X-TMP-FILE."
    }
  ],
  "lastModified": "2026-06-17T00:01:11.420",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:synology:diskstation_manager:4.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3E8E0CF7-8F1D-4C93-8144-A8C63D6561C0"
            },
            {
              "criteria": "cpe:2.3:o:synology:diskstation_manager:4.2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8863F805-4F10-461F-A99F-F60E307140A0"
            },
            {
              "criteria": "cpe:2.3:o:synology:diskstation_manager:4.3:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D793AE32-C304-44CD-965B-3442AD3B6EC6"
            },
            {
              "criteria": "cpe:2.3:o:synology:diskstation_manager:4.3-3810:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2433AB50-BAB2-4C38-8033-3031903B0DC6"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cret@cert.org"
}