CVE-2026-2872

Tenda A21 MAC Filtering Configuration Endpoint setBlackRule set_device_name stack-based overflow

HIGH
8.8
CVSS Score
Published: February 21, 2026 at 04:02 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 security vulnerability has been detected in Tenda A21 1.0.0.0. This vulnerability affects the function set_device_name of the file /goform/setBlackRule of the component MAC Filtering Configuration Endpoint. Such manipulation of the argument devName/mac leads to stack-based buffer overflow. The attack may be performed from remote. The exploit has been disclosed publicly 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.347109
SignaturePermissions RequiredVDB Entry
Source: cverecord
https://vuldb.com/?ctiid.347109
Third Party AdvisoryVDB Entry
Source: cverecord
https://vuldb.com/?submit.754634
ExploitIssue TrackingMitigationThird Party Advisory
Source: cverecord
https://github.com/QIU-DIE/cve-nneeww/issues/3
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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