CVE-2026-2873 - Tenda A21 openSchedWifi setSchedWifi stack-based overflow

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HIGH

Tenda A21 openSchedWifi setSchedWifi stack-based overflow

Published Feb 21, 2026

8.7

HIGH

CVSS 4.0

EPSS 1.03%

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.

Affected products

Vendor Tenda Product n/a Default
n/a
- Version
  1.0.0.0
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Tenda

n/a

Version	Status	Constraints
1.0.0.0	affected	-

Remediation

No remediation recorded yet.

Weaknesses (2)

CWE-119

Buffer Overflow

CWE-121

References (6)

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-7534
Advisory
https://github.com/QIU-DIE/cve-nneeww/issues/4
exploitissue-trackingIssue TrackingMitigationThird Party Advisory
https://vuldb.com/?ctiid.347110
signaturepermissions-requiredPermissions RequiredVDB Entry
https://vuldb.com/?id.347110
vdb-entrytechnical-descriptionThird Party AdvisoryVDB Entry
https://vuldb.com/?submit.754635
third-party-advisoryThird Party AdvisoryVDB Entry
https://www.tenda.com.cn/
product

Link	Providers	Tags
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-7534		Advisory
https://github.com/QIU-DIE/cve-nneeww/issues/4		exploitissue-trackingIssue TrackingMitigationThird Party Advisory
https://vuldb.com/?ctiid.347110		signaturepermissions-requiredPermissions RequiredVDB Entry
https://vuldb.com/?id.347110		vdb-entrytechnical-descriptionThird Party AdvisoryVDB Entry
https://vuldb.com/?submit.754635		third-party-advisoryThird Party AdvisoryVDB Entry
https://www.tenda.com.cn/		product