CVE-2026-2873
HIGHCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
3Description
A vulnerability was detected in Tenda A21 1.0.0.0. This issue affects the function setSchedWifi of the file /goform/openSchedWifi. Performing a manipulation of the argument schedStartTime/schedEndTime results in stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit is now public and may be used.
Analysis
Stack-based buffer overflow in Tenda A21 firmware allows remote attackers with valid credentials to achieve complete system compromise through malicious input to the schedStartTime/schedEndTime parameters in the openSchedWifi function. Public exploit code exists for this vulnerability, and no patch is currently available. …
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Remediation
Within 24 hours: Inventory all Tenda A21 devices in your environment and isolate affected units from production networks if possible. Within 7 days: Implement network segmentation to restrict administrative access to affected devices and disable the vulnerable /goform/openSchedWifi endpoint at the firewall level. …
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External POC / Exploit Code
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