CVE-2018-20394

Status: ModifiedCritical (9.8)—
Severity9.8Critical · CVSS 3.0
Exploitation probability1.51 %higher than 74% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitNot knownno public code found

Thomson DWG849 STC0.01.16, DWG850-4 ST9C.05.25, DWG855 ST80.20.26, and TWG870 STB2.01.36 devices allow remote attackers to discover credentials via iso.3.6.1.4.1.4491.2.4.1.1.6.1.1.0 and iso.3.6.1.4.1.4491.2.4.1.1.6.1.2.0 SNMP requests.

CVSS

Base score
9.8
Version
3.0
Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
1.51 %
Percentile among all scored CVEs
74
Score date
10/24/2026

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).

Affected technologies (4)

CWEs

References

Show 4 references

Raw JSON (NVD)

Show
{
  "id": "CVE-2018-20394",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2018-12-23T21:29:01.153",
  "references": [
    {
      "url": "https://github.com/ezelf/sensitivesOids/blob/master/oidpassswordleaks.csv",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://misteralfa-hack.blogspot.com/2018/12/stringbleed-y-ahora-que-passwords-leaks.html",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/ezelf/sensitivesOids/blob/master/oidpassswordleaks.csv",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://misteralfa-hack.blogspot.com/2018/12/stringbleed-y-ahora-que-passwords-leaks.html",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-522"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Thomson DWG849 STC0.01.16, DWG850-4 ST9C.05.25, DWG855 ST80.20.26, and TWG870 STB2.01.36 devices allow remote attackers to discover credentials via iso.3.6.1.4.1.4491.2.4.1.1.6.1.1.0 and iso.3.6.1.4.1.4491.2.4.1.1.6.1.2.0 SNMP requests."
    },
    {
      "lang": "es",
      "value": "Los dispositivos Thomson DWG849 STC0.01.16, DWG850-4 ST9C.05.25, DWG855 ST80.20.26 y TWG870 STB2.01.36 permiten que atacantes remotos descubran credenciales mediante peticiones SNMP iso.3.6.1.4.1.4491.2.4.1.1.6.1.1.0 e iso.3.6.1.4.1.4491.2.4.1.1.6.1.2.0."
    }
  ],
  "lastModified": "2026-06-17T01:52:46.093",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:technicolor:dwg849_firmware:stc0.01.16:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BA8874EF-9DD8-4227-BAC0-B155BD574A30"
            }
          ],
          "operator": "OR"
        },
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:technicolor:dwg849:1.0:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "FD4DA558-4278-4E54-B133-26582C1CC998"
            }
          ],
          "operator": "OR"
        }
      ],
      "operator": "AND"
    },
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:technicolor:dwg850-4_firmware:st9c.05.25:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6DDA12EA-3346-48DC-9149-DC9CFAE17D8D"
            }
          ],
          "operator": "OR"
        },
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:technicolor:dwg850-4:2.1:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "3A75FE63-AEB1-44C5-AB69-D43B49471D54"
            }
          ],
          "operator": "OR"
        }
      ],
      "operator": "AND"
    },
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:technicolor:dwg855_firmware:st80.20.26:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5922BE7A-8E76-4D15-B7A2-D46D4B7FF625"
            }
          ],
          "operator": "OR"
        },
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:technicolor:dwg855:2.1:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "4F3BFA33-8094-421E-9F79-33B8FC3E75B3"
            }
          ],
          "operator": "OR"
        }
      ],
      "operator": "AND"
    },
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:technicolor:twg870_firmware:stb2.01.36:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "85051A96-2816-4520-BF63-9775A72595C6"
            }
          ],
          "operator": "OR"
        },
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:technicolor:twg870:1.1:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "52A22B4D-B015-40C2-88BB-97B24DD92BFC"
            }
          ],
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}