CVE-2026-2873CWE-119CWE-121

Tenda A21 openSchedWifi setSchedWifi stack-based overflow

High · published February 21, 2026

CVSS v4.0
8.7
EPSS
1%
Percentile
66.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
Vector
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
EPSS
0.01146 · 66.5th percentile
Weaknesses
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer; CWE-121 · Stack-based Buffer Overflow
Published
2026-02-21T16:32Z
EPSS history
Timeline
  • 21 FEB 16:32Z
    Tenda A21 openSchedWifi setSchedWifi stack-based overflow
    cvelistv5