CVE-2026-2873
Plain English Summary
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An attacker can remotely exploit a vulnerability in the Tenda A21 router to execute malicious code by manipulating specific settings related to scheduled Wi-Fi access, which can lead to a crash or unauthorized control of the device. This attack requires no special access, making it a significant risk for anyone using this router firmware version.
Technical Description
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.
CVSS Vector Analysis
Vector String
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XExploit Resources
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Official References
Quick Information
Published
Feb 21, 2026
about 2 months ago
Last Modified
Feb 23, 2026
about 1 month ago
Vendor
tenda
Product
a21 firmware
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