CVE-2026-5527 (GCVE-0-2026-5527)

Vulnerability from cvelistv5 – Published: 2026-04-04 23:15 – Updated: 2026-04-06 13:25
VLAI
Title
Tenda 4G03 Pro ECDSA P-256 Private Key server.key hard-coded key
Summary
A weakness has been identified in Tenda 4G03 Pro 1.0/1.0re/01.bin/04.03.01.53. Affected by this issue is some unknown functionality of the file /etc/www/pem/server.key of the component ECDSA P-256 Private Key Handler. This manipulation causes use of hard-coded cryptographic key . It is possible to initiate the attack remotely.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-06 13:25 UTC
CWE
  • CWE-321 - Use of Hard-coded Cryptographic Key
  • CWE-320 - Key Management Error
Assigner
VulDB CNA
References
URL Tags
https://vuldb.com/vuln/355280 vdb-entry
https://vuldb.com/vuln/355280/cti signaturepermissions-required
https://vuldb.com/submit/782053 third-party-advisory
https://www.tenda.com.cn/ product
Impacted products
Vendor Product Version
Tenda 4G03 Pro Affected: 1.0
Affected: 1.0re
Affected: 01.bin
Affected: 04.03.01.53
Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-5527",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-06T13:25:37.832426Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-06T13:25:49.224Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "modules": [
            "ECDSA P-256 Private Key Handler"
          ],
          "product": "4G03 Pro",
          "vendor": "Tenda",
          "versions": [
            {
              "status": "affected",
              "version": "1.0"
            },
            {
              "status": "affected",
              "version": "1.0re"
            },
            {
              "status": "affected",
              "version": "01.bin"
            },
            {
              "status": "affected",
              "version": "04.03.01.53"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "CoreNode (VulDB User)"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "VulDB Vulnerability Moderation Team"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A weakness has been identified in Tenda 4G03 Pro 1.0/1.0re/01.bin/04.03.01.53. Affected by this issue is some unknown functionality of the file /etc/www/pem/server.key of the component ECDSA P-256 Private Key Handler. This manipulation causes use of hard-coded cryptographic key\r . It is possible to initiate the attack remotely."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P",
            "version": "4.0"
          }
        },
        {
          "cvssV3_1": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:W/RC:R",
            "version": "3.1"
          }
        },
        {
          "cvssV3_0": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:W/RC:R",
            "version": "3.0"
          }
        },
        {
          "cvssV2_0": {
            "baseScore": 5,
            "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N/E:POC/RL:W/RC:UR",
            "version": "2.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-321",
              "description": "Use of Hard-coded Cryptographic Key",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-320",
              "description": "Key Management Error",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-04T23:15:12.490Z",
        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB"
      },
      "references": [
        {
          "name": "VDB-355280 | Tenda 4G03 Pro ECDSA P-256 Private Key server.key hard-coded key",
          "tags": [
            "vdb-entry"
          ],
          "url": "https://vuldb.com/vuln/355280"
        },
        {
          "name": "VDB-355280 | CTI Indicators (IOB, IOC, TTP, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/vuln/355280/cti"
        },
        {
          "name": "Submit #782053 | Tenda 4G03 Pro V1.0 V04.03.01.53 Cryptographic Issues",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/submit/782053"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://www.tenda.com.cn/"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-04-04T00:00:00.000Z",
          "value": "Advisory disclosed"
        },
        {
          "lang": "en",
          "time": "2026-04-04T02:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2026-04-04T08:25:13.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "Tenda 4G03 Pro ECDSA P-256 Private Key server.key hard-coded key"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2026-5527",
    "datePublished": "2026-04-04T23:15:12.490Z",
    "dateReserved": "2026-04-04T06:20:03.869Z",
    "dateUpdated": "2026-04-06T13:25:49.224Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-5527",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "yes"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-04-06T13:25:37.832426Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-04-06T13:25:43.313Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "modules": [
                "ECDSA P-256 Private Key Handler"
              ],
              "product": "4G03 Pro",
              "vendor": "Tenda",
              "versions": [
                {
                  "status": "affected",
                  "version": "1.0"
                },
                {
                  "status": "affected",
                  "version": "1.0re"
                },
                {
                  "status": "affected",
                  "version": "01.bin"
                },
                {
                  "status": "affected",
                  "version": "04.03.01.53"
                }
              ]
            }
          ],
          "credits": [
            {
              "lang": "en",
              "type": "reporter",
              "value": "CoreNode (VulDB User)"
            },
            {
              "lang": "en",
              "type": "coordinator",
              "value": "VulDB Vulnerability Moderation Team"
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "A weakness has been identified in Tenda 4G03 Pro 1.0/1.0re/01.bin/04.03.01.53. Affected by this issue is some unknown functionality of the file /etc/www/pem/server.key of the component ECDSA P-256 Private Key Handler. This manipulation causes use of hard-coded cryptographic key\r . It is possible to initiate the attack remotely."
            }
          ],
          "metrics": [
            {
              "cvssV4_0": {
                "baseScore": 6.9,
                "baseSeverity": "MEDIUM",
                "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P",
                "version": "4.0"
              }
            },
            {
              "cvssV3_1": {
                "baseScore": 5.3,
                "baseSeverity": "MEDIUM",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:W/RC:R",
                "version": "3.1"
              }
            },
            {
              "cvssV3_0": {
                "baseScore": 5.3,
                "baseSeverity": "MEDIUM",
                "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:W/RC:R",
                "version": "3.0"
              }
            },
            {
              "cvssV2_0": {
                "baseScore": 5,
                "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N/E:POC/RL:W/RC:UR",
                "version": "2.0"
              }
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-321",
                  "description": "Use of Hard-coded Cryptographic Key",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            },
            {
              "descriptions": [
                {
                  "cweId": "CWE-320",
                  "description": "Key Management Error",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-04-04T23:15:12.490Z",
            "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
            "shortName": "VulDB"
          },
          "references": [
            {
              "name": "VDB-355280 | Tenda 4G03 Pro ECDSA P-256 Private Key server.key hard-coded key",
              "tags": [
                "vdb-entry"
              ],
              "url": "https://vuldb.com/vuln/355280"
            },
            {
              "name": "VDB-355280 | CTI Indicators (IOB, IOC, TTP, IOA)",
              "tags": [
                "signature",
                "permissions-required"
              ],
              "url": "https://vuldb.com/vuln/355280/cti"
            },
            {
              "name": "Submit #782053 | Tenda 4G03 Pro V1.0 V04.03.01.53 Cryptographic Issues",
              "tags": [
                "third-party-advisory"
              ],
              "url": "https://vuldb.com/submit/782053"
            },
            {
              "tags": [
                "product"
              ],
              "url": "https://www.tenda.com.cn/"
            }
          ],
          "timeline": [
            {
              "lang": "en",
              "time": "2026-04-04T00:00:00.000Z",
              "value": "Advisory disclosed"
            },
            {
              "lang": "en",
              "time": "2026-04-04T02:00:00.000Z",
              "value": "VulDB entry created"
            },
            {
              "lang": "en",
              "time": "2026-04-04T08:25:13.000Z",
              "value": "VulDB entry last update"
            }
          ],
          "title": "Tenda 4G03 Pro ECDSA P-256 Private Key server.key hard-coded key"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "assignerShortName": "VulDB",
        "cveId": "CVE-2026-5527",
        "datePublished": "2026-04-04T23:15:12.490Z",
        "dateReserved": "2026-04-04T06:20:03.869Z",
        "dateUpdated": "2026-04-06T13:25:49.224Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
Events included in the timeline

Loading timeline…


    Loading…

    Loading…

    Loading…

    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.