CVE-2026-2873

HIGH 8.8

Tenda A21 openSchedWifi setSchedWifi stack-based overflow

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-121 CWE-119
Vendor	tenda
Product	a21
Published	Feb 21, 2026
Last Updated	Feb 23, 2026

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CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

Tenda / A21

1.0.0.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/?id.347110 vuldb.com: https://vuldb.com/?ctiid.347110 vuldb.com: https://vuldb.com/?submit.754635 github.com: https://github.com/QIU-DIE/cve-nneeww/issues/4 tenda.com.cn: https://www.tenda.com.cn/

Credits

🔍 hhsw34 (VulDB User)