Vulnerability-Lookup

CNVD-2026-38829

Vulnerability from cnvd - Published: 2026-09-28

Title

Netcore NR268加密问题漏洞

Description

Netcore NR268是磊科推出的一款‌上网行为管理路由器。 Netcore NR268存在加密问题漏洞，该漏洞源于固件更新机制中存在的完整性验证缺陷。攻击者可利用该漏洞绕过固件签名验证并加载未授权固件。

Severity

高

Formal description

目前厂商尚未发布升级程序修复该安全问题，详情见厂商官网： https://www.netcoretec.com/

Reference

https://github.com/draw-ctf/netcore-router-public-refs/blob/main/2026.08.19-netcore-nr268-firmware-forgery.md https://www.vulncheck.com/advisories/netcore-nr268-1.7.121109-forgeable-firmware-authenticity-check-in-mtd-write

Impacted products

Name
Netcore NR268 1.7.121109

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-76852",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-76852"
    }
  },
  "description": "Netcore NR268\u662f\u78ca\u79d1\u63a8\u51fa\u7684\u4e00\u6b3e\u200c\u4e0a\u7f51\u884c\u4e3a\u7ba1\u7406\u8def\u7531\u5668\u3002\n\nNetcore NR268\u5b58\u5728\u52a0\u5bc6\u95ee\u9898\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u56fa\u4ef6\u66f4\u65b0\u673a\u5236\u4e2d\u5b58\u5728\u7684\u5b8c\u6574\u6027\u9a8c\u8bc1\u7f3a\u9677\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u7ed5\u8fc7\u56fa\u4ef6\u7b7e\u540d\u9a8c\u8bc1\u5e76\u52a0\u8f7d\u672a\u6388\u6743\u56fa\u4ef6\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5c1a\u672a\u53d1\u5e03\u5347\u7ea7\u7a0b\u5e8f\u4fee\u590d\u8be5\u5b89\u5168\u95ee\u9898\uff0c\u8be6\u60c5\u89c1\u5382\u5546\u5b98\u7f51\uff1a\r\nhttps://www.netcoretec.com/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-38829",
  "openTime": "2026-09-28",
  "products": {
    "product": "Netcore NR268 1.7.121109"
  },
  "referenceLink": "https://github.com/draw-ctf/netcore-router-public-refs/blob/main/2026.08.19-netcore-nr268-firmware-forgery.md\r\nhttps://www.vulncheck.com/advisories/netcore-nr268-1.7.121109-forgeable-firmware-authenticity-check-in-mtd-write",
  "serverity": "\u9ad8",
  "submitTime": "2026-09-21",
  "title": "Netcore NR268\u52a0\u5bc6\u95ee\u9898\u6f0f\u6d1e"
}

CVE-2026-76852 (GCVE-0-2026-76852)

Vulnerability from cvelistv5 – Published: 2026-09-15 21:57 – Updated: 2026-09-17 16:52

Title

Netcore NR268 1.7.121109 Forgeable Firmware Authenticity Check in mtd_write

Summary

Netcore NR268 firmware version 1.7.121109 has an improper integrity verification flaw in mtd_write allowing forged firmware authenticity checks. Attackers can exploit put_file.cgi and check_image_uuid.c to bypass firmware signature validation and load unauthorized firmware images.

Severity

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

8.8 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-17 16:52 UTC

CWE

CWE-354 - Improper Validation of Integrity Check Value

Assigner

VulnCheck mitre root Scorecard

References

2 references

URL	Tags
https://github.com/draw-ctf/netcore-router-public…	third-party-advisory
https://www.vulncheck.com/advisories/netcore-nr26…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
Netcore	NR268	Affected: 1.7.121109 (custom)

Date Public

2026-09-04 00:00

Credits

Zhou Ao Yin Luxing Jiang Yuxuan Liu Xin @Nebusec

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-76852",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-17T16:52:01.661088Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-17T16:52:31.430Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "NR268",
          "vendor": "Netcore",
          "versions": [
            {
              "status": "affected",
              "version": "1.7.121109",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Zhou Ao"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Yin Luxing"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Jiang Yuxuan"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Liu Xin"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "@Nebusec"
        }
      ],
      "datePublic": "2026-09-04T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Netcore NR268 firmware version 1.7.121109 has an improper integrity verification flaw in mtd_write allowing forged firmware authenticity checks. Attackers can exploit put_file.cgi and check_image_uuid.c to bypass firmware signature validation and load unauthorized firmware images."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          },
          "format": "CVSS"
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-354",
              "description": "Improper Validation of Integrity Check Value",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-15T21:57:48.762Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "Netcore router public references: Forgeable Firmware Authenticity Check in mtd_write",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://github.com/draw-ctf/netcore-router-public-refs/blob/main/2026.08.19-netcore-nr268-firmware-forgery.md"
        },
        {
          "name": "VulnCheck Advisory: Netcore NR268 1.7.121109 Forgeable Firmware Authenticity Check in mtd_write",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/netcore-nr268-1.7.121109-forgeable-firmware-authenticity-check-in-mtd-write"
        }
      ],
      "title": "Netcore NR268 1.7.121109 Forgeable Firmware Authenticity Check in mtd_write",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-76852",
    "datePublished": "2026-09-15T21:57:48.762Z",
    "dateReserved": "2026-08-19T21:47:08.935Z",
    "dateUpdated": "2026-09-17T16:52:31.430Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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CNVD-2026-38829

CVE-2026-76852 (GCVE-0-2026-76852)

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