Vulnerability-Lookup

CNVD-2026-22785

Vulnerability from cnvd - Published: 2026-06-04

Title

TRENDnet TEW-821DAP命令注入漏洞

Description

TRENDnet TEW-821DAP是美国趋势网络（TRENDnet）公司的一款无线接入点。 TRENDnet TEW-821DAP存在命令注入漏洞，该漏洞源于Firmware Udpate组件中文件/tmp/diagnostic的tools_diagnostic函数操作不当，攻击者可利用该漏洞在系统上执行任意命令。

Severity

中

Formal description

厂商尚未提供漏洞修复方案，请关注厂商主页更新： https://www.trendnet.com/support/

Reference

https://access.redhat.com/security/cve/cve-2026-7609

Impacted products

Name
TRENDnet TEW-821DAP <=1.12B01

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-7609",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-7609"
    }
  },
  "description": "TRENDnet TEW-821DAP\u662f\u7f8e\u56fd\u8d8b\u52bf\u7f51\u7edc\uff08TRENDnet\uff09\u516c\u53f8\u7684\u4e00\u6b3e\u65e0\u7ebf\u63a5\u5165\u70b9\u3002\n\nTRENDnet TEW-821DAP\u5b58\u5728\u547d\u4ee4\u6ce8\u5165\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eFirmware Udpate\u7ec4\u4ef6\u4e2d\u6587\u4ef6/tmp/diagnostic\u7684tools_diagnostic\u51fd\u6570\u64cd\u4f5c\u4e0d\u5f53\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5728\u7cfb\u7edf\u4e0a\u6267\u884c\u4efb\u610f\u547d\u4ee4\u3002",
  "formalWay": "\u5382\u5546\u5c1a\u672a\u63d0\u4f9b\u6f0f\u6d1e\u4fee\u590d\u65b9\u6848\uff0c\u8bf7\u5173\u6ce8\u5382\u5546\u4e3b\u9875\u66f4\u65b0\uff1a\r\nhttps://www.trendnet.com/support/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-22785",
  "openTime": "2026-06-04",
  "products": {
    "product": "TRENDnet TEW-821DAP \u003c=1.12B01"
  },
  "referenceLink": "https://access.redhat.com/security/cve/cve-2026-7609",
  "serverity": "\u4e2d",
  "submitTime": "2026-05-11",
  "title": "TRENDnet TEW-821DAP\u547d\u4ee4\u6ce8\u5165\u6f0f\u6d1e"
}

CVE-2026-7609 (GCVE-0-2026-7609)

Vulnerability from cvelistv5 – Published: 2026-05-02 09:00 – Updated: 2026-05-04 17:45 Unsupported When Assigned

Title

TRENDnet TEW-821DAP Firmware Udpate diagnostic tools_diagnostic os command injection

Summary

A flaw has been found in TRENDnet TEW-821DAP up to 1.12B01. The impacted element is the function tools_diagnostic of the file /tmp/diagnostic of the component Firmware Udpate. This manipulation causes os command injection. Remote exploitation of the attack is possible. The exploit has been published and may be used. The vendor explains: "That firmware version will only work on our hardware version v1.xR. We have already EOL that product 8 years ago and are no longer selling". This vulnerability only affects products that are no longer supported by the maintainer.

Severity

5.3 (Medium)


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

6.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

6.3 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-04 17:44 UTC

CWE

CWE-78 - OS Command Injection
CWE-77 - Command Injection

Assigner

VulDB mitre root

References

4 references

URL	Tags
https://vuldb.com/vuln/360566	vdb-entrytechnical-description
https://vuldb.com/vuln/360566/cti	signaturepermissions-required
https://vuldb.com/submit/806216	third-party-advisory
https://github.com/IOTRes/IOT_Firmware_Update/blo…	exploitpatch

Impacted products

1 product

Vendor	Product	Version
TRENDnet	TEW-821DAP	Affected: 1.12B01 cpe:2.3:o:trendnet:tew-821dap_firmware::::::::

Credits

IOT_Res (VulDB User) VulDB CNA Team

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-7609",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-04T17:44:42.925986Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-04T17:45:34.007Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:o:trendnet:tew-821dap_firmware:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "Firmware Udpate"
          ],
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          "vendor": "TRENDnet",
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              "status": "affected",
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            }
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          "type": "reporter",
          "value": "IOT_Res (VulDB User)"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "VulDB CNA Team"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A flaw has been found in TRENDnet TEW-821DAP up to 1.12B01. The impacted element is the function tools_diagnostic of the file /tmp/diagnostic of the component Firmware Udpate. This manipulation causes os command injection. Remote exploitation of the attack is possible. The exploit has been published and may be used. The vendor explains: \"That firmware version will only work on our hardware version v1.xR. We have already EOL that product 8 years ago and are no longer selling\". This vulnerability only affects products that are no longer supported by the maintainer."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
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            "version": "3.0"
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        {
          "name": "Submit #806216 | Trendnet TEW-821DAP v1.12B01  CWE-78 Improper Neutralization of Special Elements used in an O",
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    "dateReserved": "2026-05-01T12:07:34.727Z",
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    "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.

Detection rules are retrieved from Rulezet.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.