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ID

VAR-202603-2355


CVE

CVE-2026-4565


TITLE

Shenzhen Tenda Technology Co.,Ltd. of ac21  Multiple vulnerabilities in firmware

Trust: 0.8

sources: JVNDB: JVNDB-2026-010071

DESCRIPTION

A vulnerability was detected in Tenda AC21 16.03.08.16. Impacted is the function formSetQosBand of the file /goform/SetNetControlList. Performing a manipulation of the argument list results in buffer overflow. The attack can be initiated remotely. The exploit is now public and may be used. This exploit is currently public and could be exploited.All information handled by the software may be leaked to the outside. All information handled by the software may be rewritten. Furthermore, the software may stop working completely. Furthermore, attacks that exploit this vulnerability will not affect other software

Trust: 1.62

sources: NVD: CVE-2026-4565 // JVNDB: JVNDB-2026-010071

AFFECTED PRODUCTS

vendor:tendamodel:ac21scope:eqversion:16.03.08.16

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vendor:tendamodel:ac21scope:eqversion:ac21 firmware 16.03.08.16

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vendor:tendamodel:ac21scope:eqversion: -

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vendor:tendamodel:ac21scope: - version: -

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sources: JVNDB: JVNDB-2026-010071 // NVD: CVE-2026-4565

CVSS

SEVERITY

CVSSV2

CVSSV3

cna@vuldb.com: CVE-2026-4565
value: HIGH

Trust: 1.0

OTHER: JVNDB-2026-010071
value: HIGH

Trust: 0.8

cna@vuldb.com: CVE-2026-4565
severity: HIGH
baseScore: 9.0
vectorString: AV:N/AC:L/AU:S/C:C/I:C/A:C
accessVector: NETWORK
accessComplexity: LOW
authentication: SINGLE
confidentialityImpact: COMPLETE
integrityImpact: COMPLETE
availabilityImpact: COMPLETE
exploitabilityScore: 8.0
impactScore: 10.0
acInsufInfo: NONE
obtainAllPrivilege: NONE
obtainUserPrivilege: NONE
obtainOtherPrivilege: NONE
userInteractionRequired: NONE
version: 2.0

Trust: 1.0

OTHER: JVNDB-2026-010071
severity: HIGH
baseScore: 9.0
vectorString: AV:N/AC:L/AU:S/C:C/I:C/A:C
accessVector: NETWORK
accessComplexity: LOW
authentication: SINGLE
confidentialityImpact: COMPLETE
integrityImpact: COMPLETE
availabilityImpact: COMPLETE
exploitabilityScore: NONE
impactScore: NONE
acInsufInfo: NONE
obtainAllPrivilege: NONE
obtainUserPrivilege: NONE
obtainOtherPrivilege: NONE
userInteractionRequired: NONE
version: 2.0

Trust: 0.8

cna@vuldb.com: CVE-2026-4565
baseSeverity: HIGH
baseScore: 8.8
vectorString: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: LOW
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: HIGH
integrityImpact: HIGH
availabilityImpact: HIGH
exploitabilityScore: 2.8
impactScore: 5.9
version: 3.1

Trust: 1.0

OTHER: JVNDB-2026-010071
baseSeverity: HIGH
baseScore: 8.8
vectorString: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: LOW
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: HIGH
integrityImpact: HIGH
availabilityImpact: HIGH
exploitabilityScore: NONE
impactScore: NONE
version: 3.0

Trust: 0.8

sources: JVNDB: JVNDB-2026-010071 // NVD: CVE-2026-4565

PROBLEMTYPE DATA

problemtype:CWE-119

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problemtype:CWE-120

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problemtype:Buffer error (CWE-119) [ others ]

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problemtype: Classic buffer overflow (CWE-120) [ others ]

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sources: JVNDB: JVNDB-2026-010071 // NVD: CVE-2026-4565

PATCH

title:httpsurl:https://vuldb.com/?id.352402

Trust: 0.8

sources: JVNDB: JVNDB-2026-010071

EXTERNAL IDS

db:NVDid:CVE-2026-4565

Trust: 2.6

db:VULDBid:352402

Trust: 1.0

db:JVNDBid:JVNDB-2026-010071

Trust: 0.8

sources: JVNDB: JVNDB-2026-010071 // NVD: CVE-2026-4565

REFERENCES

url:https://github.com/hellonestor/killallbug/releases/tag/poc

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url:https://www.tenda.com.cn/

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url:https://github.com/hellonestor/killallbug/issues/14

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url:https://vuldb.com/?ctiid.352402

Trust: 1.0

url:https://vuldb.com/?id.352402

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url:https://vuldb.com/?submit.775119

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url:https://nvd.nist.gov/vuln/detail/cve-2026-4565

Trust: 0.8

sources: JVNDB: JVNDB-2026-010071 // NVD: CVE-2026-4565

SOURCES

db:JVNDBid:JVNDB-2026-010071
db:NVDid:CVE-2026-4565

LAST UPDATE DATE

2026-04-07T23:29:34.860000+00:00


SOURCES UPDATE DATE

db:JVNDBid:JVNDB-2026-010071date:2026-04-06T05:41:00
db:NVDid:CVE-2026-4565date:2026-04-03T11:31:50.243

SOURCES RELEASE DATE

db:JVNDBid:JVNDB-2026-010071date:2026-04-06T00:00:00
db:NVDid:CVE-2026-4565date:2026-03-23T01:16:43.803