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ID

VAR-202603-4905


CVE

CVE-2026-4903


TITLE

Shenzhen Tenda Technology Co.,Ltd. of AC5  Multiple vulnerabilities in firmware

Trust: 0.8

sources: JVNDB: JVNDB-2026-009573

DESCRIPTION

A flaw has been found in Tenda AC5 15.03.06.47. This vulnerability affects the function formQuickIndex of the file /goform/QuickIndex of the component POST Request Handler. This manipulation of the argument PPPOEPassword causes stack-based buffer overflow. The attack may be initiated remotely. The exploit has been published and may be used. The exploit has been exposed and is potentially being 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-2026-4903 // JVNDB: JVNDB-2026-009573

AFFECTED PRODUCTS

vendor:tendamodel:ac5scope:eqversion:15.03.06.47

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vendor:tendamodel:ac5scope:eqversion: -

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vendor:tendamodel:ac5scope:eqversion:ac5 firmware 15.03.06.47

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vendor:tendamodel:ac5scope: - version: -

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sources: JVNDB: JVNDB-2026-009573 // NVD: CVE-2026-4903

CVSS

SEVERITY

CVSSV2

CVSSV3

cna@vuldb.com: CVE-2026-4903
value: HIGH

Trust: 1.0

OTHER: JVNDB-2026-009573
value: HIGH

Trust: 0.8

cna@vuldb.com: CVE-2026-4903
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-2026-009573
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-2026-4903
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-2026-009573
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-2026-009573 // NVD: CVE-2026-4903

PROBLEMTYPE DATA

problemtype:CWE-787

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problemtype:CWE-119

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problemtype:CWE-121

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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-2026-009573 // NVD: CVE-2026-4903

PATCH

title://vuldb.com/?submit.777380url:https://lavender-bicycle-a5a.notion.site/Tenda_AC5_QuickIndex_PPPOEPassword-32053a41781f808dae98f99c99bcb21c?source=copy_link

Trust: 0.8

sources: JVNDB: JVNDB-2026-009573

EXTERNAL IDS

db:NVDid:CVE-2026-4903

Trust: 2.6

db:VULDBid:353654

Trust: 1.0

db:JVNDBid:JVNDB-2026-009573

Trust: 0.8

sources: JVNDB: JVNDB-2026-009573 // NVD: CVE-2026-4903

REFERENCES

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

Trust: 1.8

url:https://lavender-bicycle-a5a.notion.site/tenda_ac5_quickindex_pppoepassword-32053a41781f808dae98f99c99bcb21c?source=copy_link

Trust: 1.0

url:https://vuldb.com/?ctiid.353654

Trust: 1.0

url:https://vuldb.com/?submit.777380

Trust: 1.0

url:https://vuldb.com/?id.353654

Trust: 1.0

url:https://nvd.nist.gov/vuln/detail/cve-2026-4903

Trust: 0.8

sources: JVNDB: JVNDB-2026-009573 // NVD: CVE-2026-4903

SOURCES

db:JVNDBid:JVNDB-2026-009573
db:NVDid:CVE-2026-4903

LAST UPDATE DATE

2026-04-03T19:42:35.731000+00:00


SOURCES UPDATE DATE

db:JVNDBid:JVNDB-2026-009573date:2026-04-02T01:37:00
db:NVDid:CVE-2026-4903date:2026-03-31T21:08:06.830

SOURCES RELEASE DATE

db:JVNDBid:JVNDB-2026-009573date:2026-04-02T00:00:00
db:NVDid:CVE-2026-4903date:2026-03-26T23:16:21.307