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CVE-2026-16331— D-Link DNS-320 save_ajax.php unrestricted upload

Quick assessment

Affected
D-Link DNS-320
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

D-Link DNS-320是中国D-Link公司的网络存储设备。 D-Link DNS-320 1.0.2版本存在安全漏洞，该漏洞源于对文件/web/function/save_ajax.php中参数Malicious Handler的错误操作，可能导致未经身份验证的攻击者远程执行任意文件上传。

CVSS 7.3 · High EPSS 1.57% · P74

Affected Version Matrix 1

VendorProduct Version RangeStatus
D-Link DNS-320 1.0.2 affected
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I. Basic Information for CVE-2026-16331

Vulnerability Information
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Vulnerability Title
D-Link DNS-320 save_ajax.php unrestricted upload
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
Source: CVE Program / CVE List V5
Vulnerability Title
D-Link DNS-320 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
D-Link DNS-320是中国D-Link公司的网络存储设备。 D-Link DNS-320 1.0.2版本存在安全漏洞，该漏洞源于对文件/web/function/save_ajax.php中参数Malicious Handler的错误操作，可能导致未经身份验证的攻击者远程执行任意文件上传。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
D-Link DNS-320 1.0.2 cpe:2.3:h:d-link:dns-320:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-16331

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III. Intelligence Information for CVE-2026-16331

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Proof of Concept for CVE-2026-16331 (1)

Vendor Pages for CVE-2026-16331 (1)

Same Patch Batch · D-Link · 2026-07-21 · 6 CVEs total

CVE-2026-16329 7.3 HIGH D-Link DNS-320 uploadify.php unrestricted upload
CVE-2026-16330 7.3 HIGH D-Link DNS-320 uploadify.php unrestricted upload
CVE-2026-16332 7.3 HIGH D-Link DNS-320 multi_uploadify.php unrestricted upload
CVE-2026-16447 7.3 HIGH D-Link DNS-320 multi_uploadify.php unrestricted upload
CVE-2026-16448 6.3 MEDIUM D-Link DNS-1550-04 remote_backup.cgi cgi_check_rsync_rw command injection

IV. Related Vulnerabilities

Same product: DNS-320
Same vendor: D-Link
Same weakness: CWE-434

V. Comments for CVE-2026-16331

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