CVE-2026-16331 (GCVE-0-2026-16331)

Vulnerability from cvelistv5 – Published: 2026-07-21 00:45 – Updated: 2026-07-21 00:45
VLAI
Title
D-Link DNS-320 save_ajax.php unrestricted upload
Summary
A security vulnerability has been detected in D-Link DNS-320 1.0.2. This affects an unknown function of the file /web/function/save_ajax.php. Such manipulation of the argument Malicious Handler leads to unrestricted upload. The attack can be executed remotely. The exploit has been disclosed publicly and may be used.
Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
7.3 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
7.3 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
CWE
Assigner
References
Impacted products
Vendor Product Version
D-Link DNS-320 Affected: 1.0.2
    cpe:2.3:h:d-link:dns-320:*:*:*:*:*:*:*:*
 Create a notification for this product.
Credits
red88-debug (VulDB User)
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:h:d-link:dns-320:*:*:*:*:*:*:*:*"
          ],
          "product": "DNS-320",
          "vendor": "D-Link",
          "versions": [
            {
              "status": "affected",
              "version": "1.0.2"
            }
          ]
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      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "red88-debug (VulDB User)"
        }
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        }
      ],
      "metrics": [
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            "baseSeverity": "MEDIUM",
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      ],
      "problemTypes": [
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              "description": "Improper Access Controls",
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      "providerMetadata": {
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        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB"
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      "references": [
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          "name": "VDB-380697 | D-Link DNS-320 save_ajax.php unrestricted upload",
          "tags": [
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            "technical-description"
          ],
          "url": "https://vuldb.com/vuln/380697"
        },
        {
          "name": "VDB-380697 | CTI Indicators (IOB, IOC, TTP, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/vuln/380697/cti"
        },
        {
          "name": "CVE-2026-16331 | CVE Analysis and Report",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/cve/CVE-2026-16331"
        },
        {
          "name": "Submit #858464 | D-Link (Shanghai)Limited Corp.  D-Link DNS32 1.0.2 CWE-434 (Unrestricted Upload of File with Dangerous Type)",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/submit/858464"
        },
        {
          "tags": [
            "exploit"
          ],
          "url": "https://ucn9h68n9289.feishu.cn/docx/UZ6id3F1Joqlpxxn3NFcL8r7nHb?from=from_copylink"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://www.dlink.com/"
        }
      ],
      "timeline": [
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          "lang": "en",
          "time": "2026-07-20T00:00:00.000Z",
          "value": "Advisory disclosed"
        },
        {
          "lang": "en",
          "time": "2026-07-20T02:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2026-07-20T19:56:00.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "D-Link DNS-320 save_ajax.php unrestricted upload"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2026-16331",
    "datePublished": "2026-07-21T00:45:35.644Z",
    "dateReserved": "2026-07-20T17:50:32.688Z",
    "dateUpdated": "2026-07-21T00:45:35.644Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-07-21",
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      "percentile": "0.50152"
    },
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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.

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.