CVE-2026-16327Public exploitNetwork attack vector

Unauthenticated arbitrary file upload via File argument

Published Jul 20, 2026 · Updated Jul 21, 2026

Unrestricted file upload in D-Link DNS-320 1.0.2 allows remote attackers to write arbitrary files through its web interface. The /web/web_file/upload.php handler processes a manipulated File argument without preventing unrestricted uploads; the precise validation failure is undisclosed. No authentication or user interaction is required, and uploaded content can alter NAS data; execution of uploaded files is not established.

CVSS severity7.3
High
EPSS probability1.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in D-Link DNS-320 1.0.2 allows remote attackers to write arbitrary files through its web interface. The /web/web_file/upload.php handler processes a manipulated File argument without preventing unrestricted uploads; the precise validation failure is undisclosed. No authentication or user interaction is required, and uploaded content can alter NAS data; execution of uploaded files is not established.

The record

CVE
CVE-2026-16327
Published
Jul 20, 2026
Updated
Jul 21, 2026
Vendor
D-Link
Product
DNS-320
Classifications
CWE-434, CWE-284, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

D-Link · DNS-320version=1.0.2

Published CVSS scores

7.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
7.5VulDBAV:N/AC:L/Au:N/C:P/I:P/A:P
5.5VulDBCVSS: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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
CWE-284Improper Access Control
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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