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ID

VAR-202603-1999


CVE

CVE-2026-4254


TITLE

Shenzhen Tenda Technology Co.,Ltd. of AC8  Multiple vulnerabilities in firmware

Trust: 0.8

sources: JVNDB: JVNDB-2026-008093

DESCRIPTION

A weakness has been identified in Tenda AC8 up to 16.03.50.11. This vulnerability affects the function doSystemCmd of the file /goform/SysToolChangePwd of the component HTTP Endpoint. This manipulation of the argument local_2c causes stack-based buffer overflow. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks. An exploit that can be used to carry out the attack has been published.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

Trust: 1.62

sources: NVD: CVE-2026-4254 // JVNDB: JVNDB-2026-008093

AFFECTED PRODUCTS

vendor:tendamodel:ac8scope:lteversion:16.03.50.11

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vendor:tendamodel:ac8scope: - version: -

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vendor:tendamodel:ac8scope:eqversion: -

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vendor:tendamodel:ac8scope:lteversion:ac8 firmware 16.03.50.11 and earlier

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sources: JVNDB: JVNDB-2026-008093 // NVD: CVE-2026-4254

CVSS

SEVERITY

CVSSV2

CVSSV3

cna@vuldb.com: CVE-2026-4254
value: HIGH

Trust: 1.0

OTHER: JVNDB-2026-008093
value: CRITICAL

Trust: 0.8

cna@vuldb.com: CVE-2026-4254
severity: HIGH
baseScore: 10.0
vectorString: AV:N/AC:L/AU:N/C:C/I:C/A:C
accessVector: NETWORK
accessComplexity: LOW
authentication: NONE
confidentialityImpact: COMPLETE
integrityImpact: COMPLETE
availabilityImpact: COMPLETE
exploitabilityScore: 10.0
impactScore: 10.0
acInsufInfo: NONE
obtainAllPrivilege: NONE
obtainUserPrivilege: NONE
obtainOtherPrivilege: NONE
userInteractionRequired: NONE
version: 2.0

Trust: 1.0

OTHER: JVNDB-2026-008093
severity: HIGH
baseScore: 10.0
vectorString: AV:N/AC:L/AU:N/C:C/I:C/A:C
accessVector: NETWORK
accessComplexity: LOW
authentication: NONE
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-2026-4254
baseSeverity: CRITICAL
baseScore: 9.8
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: HIGH
integrityImpact: HIGH
availabilityImpact: HIGH
exploitabilityScore: 3.9
impactScore: 5.9
version: 3.1

Trust: 1.0

OTHER: JVNDB-2026-008093
baseSeverity: CRITICAL
baseScore: 9.8
vectorString: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: HIGH
integrityImpact: HIGH
availabilityImpact: HIGH
exploitabilityScore: NONE
impactScore: NONE
version: 3.0

Trust: 0.8

sources: JVNDB: JVNDB-2026-008093 // NVD: CVE-2026-4254

PROBLEMTYPE DATA

problemtype:CWE-119

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problemtype:CWE-121

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problemtype:CWE-787

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

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problemtype: Stack-based buffer overflow (CWE-121) [ others ]

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problemtype: Out-of-bounds writing (CWE-787) [NVD evaluation ]

Trust: 0.8

sources: JVNDB: JVNDB-2026-008093 // NVD: CVE-2026-4254

PATCH

title:Submit #771773url:https://github.com/digitalandrew/tenda_ac8_v5/blob/main/CVE_Report_Tenda_AC8_SysToolChangePwd_BOF.md

Trust: 0.8

sources: JVNDB: JVNDB-2026-008093

EXTERNAL IDS

db:NVDid:CVE-2026-4254

Trust: 2.6

db:VULDBid:351212

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db:JVNDBid:JVNDB-2026-008093

Trust: 0.8

sources: JVNDB: JVNDB-2026-008093 // NVD: CVE-2026-4254

REFERENCES

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

Trust: 1.8

url:https://vuldb.com/?ctiid.351212

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url:https://vuldb.com/?id.351212

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url:https://github.com/digitalandrew/tenda_ac8_v5/blob/main/cve_report_tenda_ac8_systoolchangepwd_bof.md

Trust: 1.0

url:https://vuldb.com/?submit.771773

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url:https://nvd.nist.gov/vuln/detail/cve-2026-4254

Trust: 0.8

sources: JVNDB: JVNDB-2026-008093 // NVD: CVE-2026-4254

SOURCES

db:JVNDBid:JVNDB-2026-008093
db:NVDid:CVE-2026-4254

LAST UPDATE DATE

2026-03-25T22:59:49.568000+00:00


SOURCES UPDATE DATE

db:JVNDBid:JVNDB-2026-008093date:2026-03-23T08:42:00
db:NVDid:CVE-2026-4254date:2026-03-20T13:35:42.853

SOURCES RELEASE DATE

db:JVNDBid:JVNDB-2026-008093date:2026-03-23T00:00:00
db:NVDid:CVE-2026-4254date:2026-03-16T18:16:10.773