CVE-2026-11554Public exploitNetwork attack vector

Authenticated integrity loss via vsftpd misconfiguration

Published Jun 8, 2026 · Updated Jun 8, 2026

Least privilege violation in TOTOLINK CP450 4.1.0cu.747 allows remote authenticated users to alter device integrity through vsftpd. The public record identifies /etc/vsftpd.conf as the affected locus but does not disclose the directive or operation that assigns excessive privilege. Exploitation requires low-privileged network access to the FTP service, and the published impact is limited to device integrity.

CVSS severity4.3
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Least privilege violation in TOTOLINK CP450 4.1.0cu.747 allows remote authenticated users to alter device integrity through vsftpd. The public record identifies /etc/vsftpd.conf as the affected locus but does not disclose the directive or operation that assigns excessive privilege. Exploitation requires low-privileged network access to the FTP service, and the published impact is limited to device integrity.

The record

CVE
CVE-2026-11554
Published
Jun 8, 2026
Updated
Jun 8, 2026
Vendor
TOTOLINK
Product
CP450
Classifications
CWE-272, CWE-266, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 8, 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=4.1.0cu.747

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

TOTOLINK · CP450version=4.1.0cu.747

Published CVSS scores

4.0VulDBAV:N/AC:L/Au:S/C:N/I:P/A:N
4.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-272Least Privilege Violation
CWE-266Incorrect Privilege Assignment
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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