CVE-2026-2873

Tenda A21 openSchedWifi setSchedWifi stack-based overflow

HIGH
8.8
CVSS Score
Published: February 21, 2026 at 04:32 PM UTC
Updated: June 17, 2026 at 10:31 AM UTC
2 products affected across 1 vendorA21 FirmwareA21

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Severity
HIGH8.8
Exploit prediction
EPSS 0.6%
SSVC
PoC

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (5)

VDB EntryTechnical DescriptionThird Party Advisory
Source: cverecord
https://vuldb.com/?id.347110
SignaturePermissions RequiredVDB Entry
Source: cverecord
https://vuldb.com/?ctiid.347110
Third Party AdvisoryVDB Entry
Source: cverecord
https://vuldb.com/?submit.754635
ExploitIssue TrackingMitigationThird Party Advisory
Source: cverecord
https://github.com/QIU-DIE/cve-nneeww/issues/4
Product
Source: cverecord
https://www.tenda.com.cn/

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHVulDB
Vector?

Quick Info

StatusANALYZED
CWE
CWE-121CWE-119

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