CVE-2026-9030 (GCVE-0-2026-9030)
Vulnerability from cvelistv5
Published
2026-08-07 20:38
Modified
2026-08-10 18:23
CWE
  • CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization
Summary
A denial-of-service vulnerability exists in httpd service on Archer A6 v4 where the asynchronous systool instruction handlng path in httpd does not properly synchronize or safely manage concurrent systool operations.  By sending crafted systool instructions through the asynchronous request path, successful exploitation may cause the httpd process or device management service to crash and may result in temporary loss of access to the web management interface or device reboot.
Impacted products
Vendor Product Version
TP-Link Systems Inc. Archer A6 v4 Version: 0   < V4_1.15.10 Build 260625 Rel.25447
Create a notification for this product.
Show details on NVD website


{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-9030",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-10T17:28:38.437749Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-10T18:23:58.299Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "modules": [
            "httpd"
          ],
          "product": "Archer A6 v4",
          "vendor": "TP-Link Systems Inc.",
          "versions": [
            {
              "lessThan": "V4_1.15.10 Build 260625 Rel.25447",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Dariusz Go\u0144da"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eA denial-of-service\nvulnerability exists in httpd service on Archer A6 v4 where the asynchronous systool\ninstruction handlng path in httpd does not properly synchronize or safely manage\nconcurrent systool operations.\u0026nbsp; \u003c/p\u003e\n\n\u003cp\u003eBy sending\ncrafted systool instructions through the asynchronous request path, successful\nexploitation may cause the httpd process or device management service to crash\nand may result in temporary loss of access to the web management interface or\ndevice reboot.\u003c/p\u003e"
            }
          ],
          "value": "A denial-of-service\nvulnerability exists in httpd service on Archer A6 v4 where the asynchronous systool\ninstruction handlng path in httpd does not properly synchronize or safely manage\nconcurrent systool operations.\u00a0 \n\n\n\n\n\nBy sending\ncrafted systool instructions through the asynchronous request path, successful\nexploitation may cause the httpd process or device management service to crash\nand may result in temporary loss of access to the web management interface or\ndevice reboot."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-125",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-125 Flooding"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "ADJACENT",
            "baseScore": 6.8,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "HIGH",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:A/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",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-362",
              "description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-07T20:52:28.967Z",
        "orgId": "f23511db-6c3e-4e32-a477-6aa17d310630",
        "shortName": "TPLink"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://www.tp-link.com/us/support/download/archer-a6/v4/#Firmware"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://www.tp-link.com/en/support/download/archer-a6/v4/#Firmware"
        },
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://www.tp-link.com/en/support/faq/5234/"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Authenticated Denial-of-Service in HTTPD Service in TP-Link Archer A6",
      "x_generator": {
        "engine": "Vulnogram 1.0.4"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f23511db-6c3e-4e32-a477-6aa17d310630",
    "assignerShortName": "TPLink",
    "cveId": "CVE-2026-9030",
    "datePublished": "2026-08-07T20:38:35.116Z",
    "dateReserved": "2026-05-19T16:30:33.339Z",
    "dateUpdated": "2026-08-10T18:23:58.299Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-9030\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-08-10T17:28:38.437749Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-08-10T17:28:51.496Z\"}}], \"cna\": {\"title\": \"Authenticated Denial-of-Service in HTTPD Service in TP-Link Archer A6\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Dariusz Go\\u0144da\"}], \"impacts\": [{\"capecId\": \"CAPEC-125\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-125 Flooding\"}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"Safety\": \"NOT_DEFINED\", \"version\": \"4.0\", \"Recovery\": \"NOT_DEFINED\", \"baseScore\": 6.8, \"Automatable\": \"NOT_DEFINED\", \"attackVector\": \"ADJACENT\", \"baseSeverity\": \"MEDIUM\", \"valueDensity\": \"NOT_DEFINED\", \"vectorString\": \"CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N\", \"exploitMaturity\": \"NOT_DEFINED\", \"providerUrgency\": \"NOT_DEFINED\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"HIGH\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"NONE\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"HIGH\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"NONE\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"TP-Link Systems Inc.\", \"modules\": [\"httpd\"], \"product\": \"Archer A6 v4\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"V4_1.15.10 Build 260625 Rel.25447\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://www.tp-link.com/us/support/download/archer-a6/v4/#Firmware\", \"tags\": [\"patch\"]}, {\"url\": \"https://www.tp-link.com/en/support/download/archer-a6/v4/#Firmware\", \"tags\": [\"patch\"]}, {\"url\": \"https://www.tp-link.com/en/support/faq/5234/\", \"tags\": [\"vendor-advisory\"]}], \"x_generator\": {\"engine\": \"Vulnogram 1.0.4\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"A denial-of-service\\nvulnerability exists in httpd service on Archer A6 v4 where the asynchronous systool\\ninstruction handlng path in httpd does not properly synchronize or safely manage\\nconcurrent systool operations.\\u00a0 \\n\\n\\n\\n\\n\\nBy sending\\ncrafted systool instructions through the asynchronous request path, successful\\nexploitation may cause the httpd process or device management service to crash\\nand may result in temporary loss of access to the web management interface or\\ndevice reboot.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eA denial-of-service\\nvulnerability exists in httpd service on Archer A6 v4 where the asynchronous systool\\ninstruction handlng path in httpd does not properly synchronize or safely manage\\nconcurrent systool operations.\u0026nbsp; \u003c/p\u003e\\n\\n\u003cp\u003eBy sending\\ncrafted systool instructions through the asynchronous request path, successful\\nexploitation may cause the httpd process or device management service to crash\\nand may result in temporary loss of access to the web management interface or\\ndevice reboot.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-362\", \"description\": \"CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization\"}]}], \"providerMetadata\": {\"orgId\": \"f23511db-6c3e-4e32-a477-6aa17d310630\", \"shortName\": \"TPLink\", \"dateUpdated\": \"2026-08-07T20:52:28.967Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-9030\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-10T18:23:58.299Z\", \"dateReserved\": \"2026-05-19T16:30:33.339Z\", \"assignerOrgId\": \"f23511db-6c3e-4e32-a477-6aa17d310630\", \"datePublished\": \"2026-08-07T20:38:35.116Z\", \"assignerShortName\": \"TPLink\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.


Loading…

Loading…