CVE-2026-1744Public exploitNetwork attack vector

Stored script execution via unencoded PPPoE username

Published Feb 2, 2026 · Updated Feb 2, 2026

Stored cross-site scripting in D-Link DSL-6641K N8.TR069.20131126 allows remote authenticated users to inject script via a PPPoE username. The doSubmitPPP function in sp_pppoe_user.js length-checks the Username field but appends it to the router configuration command without output encoding, and the backend stores the value. Administrator access is required to alter PPPoE settings, and the script executes when a user later views the saved configuration, enabling actions in that user’s browser context.

CVSS severity4.8
Medium
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stored cross-site scripting in D-Link DSL-6641K N8.TR069.20131126 allows remote authenticated users to inject script via a PPPoE username. The doSubmitPPP function in sp_pppoe_user.js length-checks the Username field but appends it to the router configuration command without output encoding, and the backend stores the value. Administrator access is required to alter PPPoE settings, and the script executes when a user later views the saved configuration, enabling actions in that user’s browser context.

The record

CVE
CVE-2026-1744
Published
Feb 2, 2026
Updated
Feb 2, 2026
Vendor
D-Link
Product
DSL-6641K
Classifications
CWE-79, CWE-94, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

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

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=N8.TR069.20131126

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

D-Link · DSL-6641Kversion=N8.TR069.20131126

Published CVSS scores

3.3VulDBAV:N/AC:L/Au:M/C:N/I:P/A:N
1.9VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
2.4VulDBCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N
4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

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

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-94Improper Control of Generation of Code ('Code Injection')
T1059.007JavaScript/JScript

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo