A critical backdoor vulnerability, tracked as CVE-2026-11405, has been discovered in Tenda firmware. The flaw allows unauthenticated attackers to access a device's web management interface, effectively granting full administrative control without requiring any credentials.
The severity of this vulnerability is heightened by the lack of a patch. According to SecurityWeek, no official fix has been released, leaving countless devices exposed. While the exact CVSS score was not specified in the source, the ability for unauthenticated remote access places it in the highest risk category.
Attackers can exploit CVE-2026-11405 by directly targeting the web management interface over the network. No authentication is needed, meaning any device with the vulnerable firmware exposed to the internet is at immediate risk. Successful exploitation enables an attacker to modify device settings, intercept traffic, or pivot to internal networks.
No mitigation or workaround has been provided by Tenda as of this report. Users are advised to disable remote web management access where possible, restrict network access to trusted IPs, and monitor for any official firmware updates. Until a patch arrives, devices remain vulnerable.
The full scope of affected Tenda device models remains unclear. SecurityWeek notes the flaw was publicly disclosed without a coordinated advisory from the vendor, raising concerns about response timelines.