CVE-2026-15486Network attack vector

Authenticated command execution via unvalidated DDNS fields

Published Jul 12, 2026 · Updated Jul 12, 2026

OS command injection in TRENDnet TEW-821DAP 1.11B03 allows remote authenticated users to execute commands through the DDNS web handler. The sub_42026C handler copies hostname, username, and password values from /goform/tools_ddns into a DDNS configuration string without validation, writes it to a configuration file, and restarts the DDNS service. Valid management credentials and network access to the web interface are required; injected commands can read or alter device data or interrupt service.

CVSS severity5.3
Medium
EPSS probability1.77%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in TRENDnet TEW-821DAP 1.11B03 allows remote authenticated users to execute commands through the DDNS web handler. The sub_42026C handler copies hostname, username, and password values from /goform/tools_ddns into a DDNS configuration string without validation, writes it to a configuration file, and restarts the DDNS service. Valid management credentials and network access to the web interface are required; injected commands can read or alter device data or interrupt service.

The record

CVE
CVE-2026-15486
Published
Jul 12, 2026
Updated
Jul 12, 2026
Vendor
TRENDnet
Product
TEW-821DAP
Classifications
CWE-78, CWE-77, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 12, 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=1.11B03

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

TRENDnet · TEW-821DAPversion=1.11B03

Published CVSS scores

6.3TenableCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
5.3TenableCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
6.5TenableAV:N/AC:L/Au:S/C:P/I:P/A: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

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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