CVE-2026-19813 (GCVE-0-2026-19813)

Vulnerability from cvelistv5 – Published: 2026-08-14 08:00 – Updated: 2026-08-14 08:00
VLAI
Title
TOTOLINK A800R firewall.so cstecgi.cgi setMacFilterRules stack-based overflow
Summary
A security vulnerability has been detected in TOTOLINK A800R 4.1.2cu.5137_B20200730. This impacts the function setMacFilterRules of the file /cgi-bin/cstecgi.cgi of the component firewall.so. Such manipulation of the argument Comment leads to stack-based buffer overflow. The attack may be performed from remote. The exploit has been disclosed publicly and may be used.
CWE
Assigner
References
Impacted products
Vendor Product Version
TOTOLINK A800R Affected: 4.1.2cu.5137_B20200730
    cpe:2.3:o:totolink:a800r_firmware:*:*:*:*:*:*:*:*
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:o:totolink:a800r_firmware:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "firewall.so"
          ],
          "product": "A800R",
          "vendor": "TOTOLINK",
          "versions": [
            {
              "status": "affected",
              "version": "4.1.2cu.5137_B20200730"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "panda_0x1 (VulDB User)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A security vulnerability has been detected in TOTOLINK A800R 4.1.2cu.5137_B20200730. This impacts the function setMacFilterRules of the file /cgi-bin/cstecgi.cgi of the component firewall.so. Such manipulation of the argument Comment leads to stack-based buffer overflow. The attack may be performed from remote. The exploit has been disclosed publicly and may be used."
        }
      ],
      "metrics": [
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            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "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/E:P",
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          "url": "https://vuldb.com/vuln/389949"
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          "name": "VDB-389949 | CTI Indicators (IOB, IOC, IOA)",
          "tags": [
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          "url": "https://vuldb.com/vuln/389949/cti"
        },
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          "name": "CVE-2026-19813 | CVE Analysis and Report",
          "tags": [
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          "url": "https://vuldb.com/cve/CVE-2026-19813"
        },
        {
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          "tags": [
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          "url": "https://github.com/panda666-888/vuls/blob/main/totolink/a800r/setMacFilterRules.md"
        },
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          "tags": [
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          "url": "https://www.totolink.net/"
        }
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          "value": "Advisory disclosed"
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          "time": "2026-08-14T02:00:00.000Z",
          "value": "VulDB entry created"
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        {
          "lang": "en",
          "time": "2026-08-14T03:01:08.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "TOTOLINK A800R firewall.so cstecgi.cgi setMacFilterRules stack-based overflow",
      "x_generator": [
        "VulDB PVTS v202608"
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2026-19813",
    "datePublished": "2026-08-14T08:00:11.323Z",
    "dateReserved": "2026-08-14T00:55:43.526Z",
    "dateUpdated": "2026-08-14T08:00:11.323Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "cve": "CVE-2026-19813",
      "date": "2026-08-14",
      "epss": "0.00601",
      "percentile": "0.45806"
    },
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  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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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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