CVE-2026-121606 (GCVE-0-2026-121606)

Vulnerability from cvelistv5 – Published: 2026-11-04 01:00 – Updated: 2026-11-04 01:00
VLAI
Title
Qihoo 360 D621-2/D603-2/D600-2/D619/D606-6/D706 Firmware Signature Verification iscm verify_sign signature verification
Summary
A vulnerability has been found in Qihoo 360 D621-2, D603-2, D600-2, D619, D606-6 and D706 up to 6.4.9. Affected by this issue is the function verify_sign of the file fs2/bin/iscm of the component Firmware Signature Verification. Such manipulation of the argument sign leads to improper verification of cryptographic signature. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
  • CWE-345 - Insufficient Verification of Data Authenticity
Assigner
VulDB CNA under the mitre root
CNA scorecard B 83/100 over 3791 records in the last 180 days details
References
URL Tags
https://vuldb.com/vuln/430443 vdb-entrytechnical-description
https://vuldb.com/vuln/430443/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-121606 third-party-advisory
https://vuldb.com/submit/1023261 third-party-advisory
https://gist.github.com/gajgdm6-cpu/cf98af20ddb77… exploit
Impacted products
Vendor Product Version CPE status
Qihoo 360 D621-2 Affected: 6.4.0
Affected: 6.4.1
Affected: 6.4.2
Affected: 6.4.3
Affected: 6.4.4
Affected: 6.4.5
Affected: 6.4.6
Affected: 6.4.7
Affected: 6.4.8
Affected: 6.4.9
    cpe:2.3:a:qihoo_360:d621-2:*:*:*:*:*:*:*:*
Create a notification for this product.
Qihoo 360 D603-2 Affected: 6.4.0
Affected: 6.4.1
Affected: 6.4.2
Affected: 6.4.3
Affected: 6.4.4
Affected: 6.4.5
Affected: 6.4.6
Affected: 6.4.7
Affected: 6.4.8
Affected: 6.4.9
    cpe:2.3:a:qihoo_360:d603-2:*:*:*:*:*:*:*:*
Create a notification for this product.
Qihoo 360 D600-2 Affected: 6.4.0
Affected: 6.4.1
Affected: 6.4.2
Affected: 6.4.3
Affected: 6.4.4
Affected: 6.4.5
Affected: 6.4.6
Affected: 6.4.7
Affected: 6.4.8
Affected: 6.4.9
    cpe:2.3:a:qihoo_360:d600-2:*:*:*:*:*:*:*:*
Create a notification for this product.
Qihoo 360 D619 Affected: 6.4.0
Affected: 6.4.1
Affected: 6.4.2
Affected: 6.4.3
Affected: 6.4.4
Affected: 6.4.5
Affected: 6.4.6
Affected: 6.4.7
Affected: 6.4.8
Affected: 6.4.9
    cpe:2.3:a:qihoo_360:d619:*:*:*:*:*:*:*:*
Create a notification for this product.
Qihoo 360 D606-6 Affected: 6.4.0
Affected: 6.4.1
Affected: 6.4.2
Affected: 6.4.3
Affected: 6.4.4
Affected: 6.4.5
Affected: 6.4.6
Affected: 6.4.7
Affected: 6.4.8
Affected: 6.4.9
    cpe:2.3:a:qihoo_360:d606-6:*:*:*:*:*:*:*:*
Create a notification for this product.
Qihoo 360 D706 Affected: 6.4.0
Affected: 6.4.1
Affected: 6.4.2
Affected: 6.4.3
Affected: 6.4.4
Affected: 6.4.5
Affected: 6.4.6
Affected: 6.4.7
Affected: 6.4.8
Affected: 6.4.9
    cpe:2.3:a:qihoo_360:d706:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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                  },
                  {
                    "status": "affected",
                    "version": "6.4.7"
                  },
                  {
                    "status": "affected",
                    "version": "6.4.8"
                  },
                  {
                    "status": "affected",
                    "version": "6.4.9"
                  }
                ]
              }
            ],
            "source": "cna@vuldb.com"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "A vulnerability has been found in Qihoo 360 D621-2, D603-2, D600-2, D619, D606-6 and D706 up to 6.4.9. Affected by this issue is the function verify_sign of the file fs2/bin/iscm of the component Firmware Signature Verification. Such manipulation of the argument sign leads to improper verification of cryptographic signature. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way."
          }
        ],
        "id": "CVE-2026-121606",
        "lastModified": "2026-11-04T01:17:24.050",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "HIGH",
              "cvssData": {
                "accessComplexity": "LOW",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "COMPLETE",
                "baseScore": 10.0,
                "confidentialityImpact": "COMPLETE",
                "integrityImpact": "COMPLETE",
                "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
                "version": "2.0"
              },
              "exploitabilityScore": 10.0,
              "impactScore": 10.0,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "cna@vuldb.com",
              "type": "Secondary",
              "userInteractionRequired": false
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 10.0,
                "baseSeverity": "CRITICAL",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "CHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 6.0,
              "source": "cna@vuldb.com",
              "type": "Primary"
            }
          ],
          "cvssMetricV40": [
            {
              "cvssData": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "LOW",
                "attackRequirements": "NONE",
                "attackVector": "NETWORK",
                "availabilityRequirement": "NOT_DEFINED",
                "baseScore": 9.3,
                "baseSeverity": "CRITICAL",
                "confidentialityRequirement": "NOT_DEFINED",
                "exploitMaturity": "PROOF_OF_CONCEPT",
                "integrityRequirement": "NOT_DEFINED",
                "modifiedAttackComplexity": "NOT_DEFINED",
                "modifiedAttackRequirements": "NOT_DEFINED",
                "modifiedAttackVector": "NOT_DEFINED",
                "modifiedPrivilegesRequired": "NOT_DEFINED",
                "modifiedSubAvailabilityImpact": "NOT_DEFINED",
                "modifiedSubConfidentialityImpact": "NOT_DEFINED",
                "modifiedSubIntegrityImpact": "NOT_DEFINED",
                "modifiedUserInteraction": "NOT_DEFINED",
                "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
                "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
                "modifiedVulnIntegrityImpact": "NOT_DEFINED",
                "privilegesRequired": "NONE",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "HIGH",
                "subConfidentialityImpact": "HIGH",
                "subIntegrityImpact": "HIGH",
                "userInteraction": "NONE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/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",
                "version": "4.0",
                "vulnAvailabilityImpact": "HIGH",
                "vulnConfidentialityImpact": "HIGH",
                "vulnIntegrityImpact": "HIGH",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
              "source": "cna@vuldb.com",
              "type": "Secondary"
            }
          ]
        },
        "published": "2026-11-04T01:17:23.880",
        "references": [
          {
            "source": "cna@vuldb.com",
            "url": "https://gist.github.com/gajgdm6-cpu/cf98af20ddb77f27a7c112214a6280f7"
          },
          {
            "source": "cna@vuldb.com",
            "url": "https://vuldb.com/cve/CVE-2026-121606"
          },
          {
            "source": "cna@vuldb.com",
            "url": "https://vuldb.com/submit/1023261"
          },
          {
            "source": "cna@vuldb.com",
            "url": "https://vuldb.com/vuln/430443"
          },
          {
            "source": "cna@vuldb.com",
            "url": "https://vuldb.com/vuln/430443/cti"
          }
        ],
        "sourceIdentifier": "cna@vuldb.com",
        "vulnStatus": "Deferred",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-345"
              },
              {
                "lang": "en",
                "value": "CWE-347"
              }
            ],
            "source": "cna@vuldb.com",
            "type": "Primary"
          }
        ]
      }
    }
  }
}



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