Vulnerability record · CVE-2026-2870 · published 21 February 2026
CVE-2026-2870: Tenda a21 firmware memory buffer overflow vulnerability
Tenda · A21 Firmware
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.
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: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:
Affected products
1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.
References
| Link | Tags |
|---|---|
| https://github.com/QIU-DIE/cve-nneeww/issues/1 | ExploitIssue TrackingMitigationThird Party Advisory |
| https://vuldb.com/?ctiid.347107 | Permissions RequiredVDB Entry |
| https://vuldb.com/?id.347107 | Third Party AdvisoryVDB Entry |
| https://vuldb.com/?submit.754627 | Third Party AdvisoryVDB Entry |
| https://www.tenda.com.cn/ | Product |
Track CVE-2026-2870 inside VULONE
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Related vulnerabilities
Same products first, then exploited flaws of the same weakness class.
Source: NIST National Vulnerability Database (record CVE-2026-2870), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.
