Description
A security vulnerability has been detected in Tenda A21 1.0.0.0. This vulnerability affects the function set_device_name of the file /goform/setBlackRule of the component MAC Filtering Configuration Endpoint. Such manipulation of the argument devName/mac leads to stack-based buffer overflow. The attack may be performed from remote. The exploit has been disclosed publicly and may be used.
References (5)
Core 5
Core References
Permissions Required, VDB Entry vdb-entry
technical-description
https://vuldb.com/?id.347109
Permissions Required, VDB Entry signature
permissions-required
https://vuldb.com/?ctiid.347109
Permissions Required, VDB Entry third-party-advisory
https://vuldb.com/?submit.754634
Issue Tracking exploit
issue-tracking
https://github.com/QIU-DIE/cve-nneeww/issues/3
Various Sources product
https://www.tenda.com.cn/
Scores
CVSS v3
8.8
EPSS
0.0011
EPSS Percentile
29.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
total
Details
CWE
CWE-121
CWE-119
Status
published
Products (1)
tenda/a21_firmware
1.0.0.0
Published
Feb 21, 2026
Tracked Since
Feb 21, 2026