CVE-2026-2870
Plain English Summary
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This vulnerability allows an attacker to remotely execute code on Tenda A21 routers by exploiting a flaw in the firmware that leads to a stack-based buffer overflow. The attacker just needs to send specially crafted data to the device, making it a serious risk for anyone using the affected firmware version.
Technical Description
A security flaw has been discovered in Tenda A21 1.0.0.0. Affected by this issue is the function set_qosMib_list of the file /goform/formSetQosBand. The manipulation of the argument list results in stack-based buffer overflow. The attack can be executed remotely. The exploit has been released to the public and may be used for attacks.
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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