Vulnerability-Lookup

CNVD-2026-38831

Vulnerability from cnvd - Published: 2026-09-28

Title

Netcore NR255 V空指针引用漏洞

Description

Netcore NR255 V是磊科（netcore）推出的一款‌企业级上网行为管理路由器‌。 Netcore NR255 V存在空指针引用漏洞，该漏洞源于服务质量设置模块中的计算机生成图像处理程序未有效检查输入转换结果，攻击者可利用该漏洞发送特制请求触发空指针解引用，导致目标路由器拒绝服务。

Severity

中

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-nr255v-null-deref-atoi.md https://www.vulncheck.com/advisories/netcore-nr255-v-1.5.130703-null-pointer-dereference-via-unchecked-atoi-in-qos-setter-handlers

Impacted products

Name
Netcore NR255 V 1.5.130703

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-76865",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-76865"
    }
  },
  "description": "Netcore NR255 V\u662f\u78ca\u79d1\uff08netcore\uff09\u63a8\u51fa\u7684\u4e00\u6b3e\u200c\u4f01\u4e1a\u7ea7\u4e0a\u7f51\u884c\u4e3a\u7ba1\u7406\u8def\u7531\u5668\u200c\u3002\n\nNetcore NR255 V\u5b58\u5728\u7a7a\u6307\u9488\u5f15\u7528\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u670d\u52a1\u8d28\u91cf\u8bbe\u7f6e\u6a21\u5757\u4e2d\u7684\u8ba1\u7b97\u673a\u751f\u6210\u56fe\u50cf\u5904\u7406\u7a0b\u5e8f\u672a\u6709\u6548\u68c0\u67e5\u8f93\u5165\u8f6c\u6362\u7ed3\u679c\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u53d1\u9001\u7279\u5236\u8bf7\u6c42\u89e6\u53d1\u7a7a\u6307\u9488\u89e3\u5f15\u7528\uff0c\u5bfc\u81f4\u76ee\u6807\u8def\u7531\u5668\u62d2\u7edd\u670d\u52a1\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-2026-38831",
  "openTime": "2026-09-28",
  "products": {
    "product": "Netcore NR255 V 1.5.130703"
  },
  "referenceLink": "https://github.com/draw-ctf/netcore-router-public-refs/blob/main/2026.08.19-netcore-nr255v-null-deref-atoi.md\r\nhttps://www.vulncheck.com/advisories/netcore-nr255-v-1.5.130703-null-pointer-dereference-via-unchecked-atoi-in-qos-setter-handlers",
  "serverity": "\u4e2d",
  "submitTime": "2026-09-21",
  "title": "Netcore NR255 V\u7a7a\u6307\u9488\u5f15\u7528\u6f0f\u6d1e"
}

CVE-2026-76865 (GCVE-0-2026-76865)

Vulnerability from cvelistv5 – Published: 2026-09-15 21:57 – Updated: 2026-09-16 19:31

Title

Netcore NR255-V 1.5.130703 NULL Pointer Dereference via Unchecked atoi() in QoS Setter Handlers

Summary

Netcore NR255-V version 1.5.130703 contains a null pointer dereference vulnerability in the QoS setter CGI handlers filter_conn_del_cgi.c and gre_prio_set_cgi.c due to unchecked atoi() results. An attacker can trigger the flaw by supplying crafted input to these handlers, causing a denial of service.

Severity

6.9 (Medium)


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

4.9 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-16 19:31 UTC

CWE

CWE-476 - NULL Pointer Dereference

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-nr25…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
Netcore	NR255-V	Affected: 1.5.130703 (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-2026-76865",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-16T19:31:33.689629Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-16T19:31:50.392Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "NR255-V",
          "vendor": "Netcore",
          "versions": [
            {
              "status": "affected",
              "version": "1.5.130703",
              "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 NR255-V version 1.5.130703 contains a null pointer dereference vulnerability in the QoS setter CGI handlers filter_conn_del_cgi.c and gre_prio_set_cgi.c due to unchecked atoi() results. An attacker can trigger the flaw by supplying crafted input to these handlers, causing a denial of service."
        }
      ],
      "metrics": [
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          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "HIGH",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          },
          "format": "CVSS"
        },
        {
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            "availabilityImpact": "HIGH",
            "baseScore": 4.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
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          "descriptions": [
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              "lang": "en",
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      "providerMetadata": {
        "dateUpdated": "2026-09-15T21:57:57.602Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "Netcore router public references: NULL Pointer Dereference via Unchecked atoi() in QoS Setter Handlers",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://github.com/draw-ctf/netcore-router-public-refs/blob/main/2026.08.19-netcore-nr255v-null-deref-atoi.md"
        },
        {
          "name": "VulnCheck Advisory: Netcore NR255-V 1.5.130703 NULL Pointer Dereference via Unchecked atoi() in QoS Setter Handlers",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/netcore-nr255-v-1.5.130703-null-pointer-dereference-via-unchecked-atoi-in-qos-setter-handlers"
        }
      ],
      "title": "Netcore NR255-V 1.5.130703 NULL Pointer Dereference via Unchecked atoi() in QoS Setter Handlers",
      "x_generator": {
        "engine": "vulncheck-endgame"
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  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-76865",
    "datePublished": "2026-09-15T21:57:57.602Z",
    "dateReserved": "2026-08-19T21:47:08.936Z",
    "dateUpdated": "2026-09-16T19:31:50.392Z",
    "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.
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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-2026-38831

CVE-2026-76865 (GCVE-0-2026-76865)

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