November 13, 2026 Follow Egret
CVE-2026-107441 · CVE record: PUBLISHED

CVE-2026-107441

Zyxel GS1900-24E firmware, Zyxel GS1900-8 firmware, Zyxel GS1900-8HP firmware, Zyxel GS1900-10HP firmware, Zyxel GS1900-16 firmware, Zyxel GS1900-24 firmware, Zyxel GS1900-24EP firmware, Zyxel GS1900-HPv2 firmware, Zyxel GS1900-48 firmware, Zyxel GS1900-48HPv2 firmware

An out-of-bounds write vulnerability in the CGI program of Zyxel GS1900-24E firmware versions through 2.90(AAHK.2)C0 could allow an unauthenticated adjacent attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request.

Exploitation evidence

Not listed in the latest downloaded CISA KEV catalog. This does not establish an absence of exploitation.

KEV checked 13 Nov 2026, 00:20 Jerusalem · Original catalog ↗

Reported products and versions

Zyxel / GS1900-24E firmware

Default status: unaffected

  • affected: <= 2.90(AAHK.2)C0

Zyxel / GS1900-8 firmware

Default status: unaffected

  • affected: <= 2.90(AAHH.2)C0

Zyxel / GS1900-8HP firmware

Default status: unaffected

  • affected: <= 2.90(AAHI.2)C0

Zyxel / GS1900-10HP firmware

Default status: unaffected

  • affected: <= 2.90(AAZI.2)C0

Zyxel / GS1900-16 firmware

Default status: unaffected

  • affected: <= 2.90(AAHJ.2)C0

Zyxel / GS1900-24 firmware

Default status: unaffected

  • affected: <= 2.90(AAHL.2)C0

Zyxel / GS1900-24EP firmware

Default status: unaffected

  • affected: <= 2.90(ABTO.2)C0

Zyxel / GS1900-HPv2 firmware

Default status: unaffected

  • affected: <= 2.90(ABTP.2)C0

Zyxel / GS1900-48 firmware

Default status: unaffected

  • affected: <= 2.90(AAHN.2)C0

Zyxel / GS1900-48HPv2 firmware

Default status: unaffected

  • affected: <= 2.90(ABTQ.2)C0

Fixes and workarounds

No explicit solution text in the downloaded CVE record. Consult the vendor advisory; unaffected version ranges are shown above as reported, not inferred as a patch recommendation.

Sources and related reporting

CVE Program record ↗ · Download tracked evidence as JSON

Monitored source mentions

Shared CVE identifiers link source mentions; they do not establish that the reports describe the same incident.

Observed change timeline

History begins when Egret first downloads each source. It is not the complete upstream CVE history.

12 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-12",
  "epss": 0.00293,
  "percentile": 0.22158
}
12 Nov 2026, 12:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-10",
  "epss": 0.00293,
  "percentile": 0.22077
}
12 Nov 2026, 12:20 Jerusalem · CVE Program record changed

Stored CNA snapshot at this observation.

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-107441",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-11-03T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-11-05T04:55:43.911Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-24E firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "<= 2.90(AAHK.2)C0"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-8 firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "<= 2.90(AAHH.2)C0"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-8HP firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "<= 2.90(AAHI.2)C0"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-10HP firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "<= 2.90(AAZI.2)C0"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-16 firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "<= 2.90(AAHJ.2)C0"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-24 firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "<= 2.90(AAHL.2)C0"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-24EP firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "<= 2.90(ABTO.2)C0"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-HPv2 firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "<= 2.90(ABTP.2)C0"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-48 firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "<= 2.90(AAHN.2)C0"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "GS1900-48HPv2 firmware",
          "vendor": "Zyxel",
          "versions": [
            {
              "status": "affected",
              "version": "<= 2.90(ABTQ.2)C0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "An out-of-bounds write vulnerability in the CGI program of Zyxel GS1900-24E firmware versions through 2.90(AAHK.2)C0 could allow an unauthenticated adjacent attacker  to exploit the flaw and potentially execute OS commands via a crafted HTTP request."
            }
          ],
          "value": "An out-of-bounds write vulnerability in the CGI program of Zyxel GS1900-24E firmware versions through 2.90(AAHK.2)C0 could allow an unauthenticated adjacent attacker  to exploit the flaw and potentially execute OS commands via a crafted HTTP request."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-787",
              "description": "CWE-787 Out-of-bounds write",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-03T01:41:52.029Z",
        "orgId": "96e50032-ad0d-4058-a115-4d2c13821f9f",
        "shortName": "Zyxel"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-out-of-bounds-write-vulnerability-in-gs1900-series-switches-11-03-2026"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "x_generator": {
        "engine": "Vulnogram 1.0.5"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "96e50032-ad0d-4058-a115-4d2c13821f9f",
    "assignerShortName": "Zyxel",
    "cveId": "CVE-2026-107441",
    "datePublished": "2026-11-03T01:41:52.029Z",
    "dateReserved": "2026-10-08T02:07:52.349Z",
    "dateUpdated": "2026-11-05T04:55:43.911Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}
Egret — Back to top Egret