CVE-2026-2873
Tenda A21 openSchedWifi setSchedWifi stack-based overflow
- State
- Published
- Severity
- 8.7 High
- Published
- Feb 21, 2026
- Updated
- Feb 23, 2026
- Reserved
- Feb 20, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | 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 | VulDB |
| 3.1 | 8.8 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R | VulDB |
| 3.0 | 8.8 High | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R | VulDB |
| 2.0 | 9.0 High | AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
A21Tenda |
|
References
- VDB-347110 | Tenda A21 openSchedWifi setSchedWifi stack-based overflowvdb-entrytechnical-description
- VDB-347110 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- Submit #754635 | Tenda A21 V1.0.0.0 Stack-based Buffer Overflowthird-party-advisory
- https://github.com/QIU-DIE/cve-nneeww/issues/4exploitissue-tracking
- https://www.tenda.com.cn/product
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