CVE-2026-11620: TOTOLINK EX200 vsftpd vsftpd.conf least privilege violation
A security flaw has been discovered in TOTOLINK EX200 4.0.3c.7646. This affects an unknown function of the file /etc/vsftpd.conf of the component vsftpd. The manipulation results in least privilege violation. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Remove
Remove
vsftpdfrom your environment.Uninstall or disable the vsftpd service on affected TOTOLINK EX200 devices if FTP functionality is not required.
- Configuration
Review and edit /etc/vsftpd.conf to remove or disable configuration options that grant elevated privileges or otherwise broaden access. If specific unsafe options are present, disable them. If unsure which options are vulnerable, disable the vsftpd service until a vendor fix is available.
vsftpd /etc/vsftpd.conf (privilege-related settings) = remove or disable settings that grant elevated privileges / restrict FTP access - Compensating control
Restrict remote access to the device's FTP service (e.g., TCP 21 and passive ports) to trusted IP addresses via firewall rules or network ACLs; block FTP access from untrusted networks or the Internet.
- Operational
Monitor devices for indicators of compromise and check /etc/vsftpd.conf for unauthorized changes. Rotate credentials and reset affected accounts if compromise is suspected. Apply any vendor-provided patches or updates as soon as they become available.
Event History
Frequently Asked Questions
What is the severity of CVE-2026-11620?
The severity of CVE-2026-11620 is rated as medium with a score of 5.3.
How do I fix CVE-2026-11620?
To fix CVE-2026-11620, ensure that the permissions and configurations in /etc/vsftpd.conf are correctly set to follow the principle of least privilege.
What type of vulnerability is CVE-2026-11620?
CVE-2026-11620 is categorized as a least privilege violation vulnerability affecting the vsftpd configuration.
Can CVE-2026-11620 be exploited remotely?
Yes, CVE-2026-11620 can be exploited remotely, allowing attackers to manipulate the configuration.
Which device is affected by CVE-2026-11620?
CVE-2026-11620 affects the TOTOLINK EX200 version 4.0.3c.7646.