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ID

VAR-202308-3396


CVE

CVE-2023-40899


TITLE

Shenzhen Tenda Technology Co.,Ltd.  of  ac8v4  Out-of-bounds write vulnerability in firmware

Trust: 0.8

sources: JVNDB: JVNDB-2023-022706

DESCRIPTION

Tenda AC8 v4 US_AC8V4.0si_V16.03.34.06_cn was discovered to contain a stack overflow via parameter macFilterType and parameter deviceList at /goform/setMacFilterCfg. Shenzhen Tenda Technology Co.,Ltd. of ac8v4 An out-of-bounds write vulnerability exists in firmware.Information is obtained, information is tampered with, and service operation is interrupted. (DoS) It may be in a state. The Tenda AC8 is a dual-band gigabit wireless router designed for fiber-optic homes with speeds up to 1000 Mbps. It supports dual-band concurrent transmission rates of up to 1167 Mbps and is equipped with full gigabit ports (one WAN port and three LAN ports), meeting broadband access needs between 100 and 1000 Mbps. An attacker could exploit this vulnerability by submitting a specially crafted request to cause the application to crash or execute arbitrary code in the application's context

Trust: 2.16

sources: NVD: CVE-2023-40899 // JVNDB: JVNDB-2023-022706 // CNVD: CNVD-2025-20711

IOT TAXONOMY

category:['Network device']sub_category: -

Trust: 0.6

sources: CNVD: CNVD-2025-20711

AFFECTED PRODUCTS

vendor:tendamodel:ac8scope:eqversion:16.03.34.06

Trust: 1.0

vendor:tendamodel:ac8v4scope:eqversion: -

Trust: 0.8

vendor:tendamodel:ac8v4scope:eqversion:ac8v4 firmware 16.03.34.06

Trust: 0.8

vendor:tendamodel:ac8v4scope: - version: -

Trust: 0.8

vendor:tendamodel:ac8 us ac8v4.0si v16.03.34.06 cnscope:eqversion:v4

Trust: 0.6

sources: CNVD: CNVD-2025-20711 // JVNDB: JVNDB-2023-022706 // NVD: CVE-2023-40899

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov: CVE-2023-40899
value: CRITICAL

Trust: 1.0

NVD: CVE-2023-40899
value: CRITICAL

Trust: 0.8

CNVD: CNVD-2025-20711
value: HIGH

Trust: 0.6

CNVD: CNVD-2025-20711
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: 0.6

nvd@nist.gov: CVE-2023-40899
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

NVD: CVE-2023-40899
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: CNVD: CNVD-2025-20711 // JVNDB: JVNDB-2023-022706 // NVD: CVE-2023-40899

PROBLEMTYPE DATA

problemtype:CWE-787

Trust: 1.0

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

Trust: 0.8

sources: JVNDB: JVNDB-2023-022706 // NVD: CVE-2023-40899

EXTERNAL IDS

db:NVDid:CVE-2023-40899

Trust: 3.3

db:JVNDBid:JVNDB-2023-022706

Trust: 0.8

db:CNVDid:CNVD-2025-20711

Trust: 0.6

db:VULMONid:CVE-2023-40899

Trust: 0.1

sources: CNVD: CNVD-2025-20711 // VULMON: CVE-2023-40899 // JVNDB: JVNDB-2023-022706 // NVD: CVE-2023-40899

REFERENCES

url:https://github.com/peris-navince/founded-0-days/blob/main/ac8/formsetmacfiltercfg/1.md

Trust: 2.5

url:https://nvd.nist.gov/vuln/detail/cve-2023-40899

Trust: 0.8

url:https://nvd.nist.gov

Trust: 0.1

sources: CNVD: CNVD-2025-20711 // VULMON: CVE-2023-40899 // JVNDB: JVNDB-2023-022706 // NVD: CVE-2023-40899

SOURCES

db:CNVDid:CNVD-2025-20711
db:VULMONid:CVE-2023-40899
db:JVNDBid:JVNDB-2023-022706
db:NVDid:CVE-2023-40899

LAST UPDATE DATE

2025-12-18T00:27:25.745000+00:00


SOURCES UPDATE DATE

db:CNVDid:CNVD-2025-20711date:2025-09-05T00:00:00
db:VULMONid:CVE-2023-40899date:2023-08-24T00:00:00
db:JVNDBid:JVNDB-2023-022706date:2024-01-24T01:45:00
db:NVDid:CVE-2023-40899date:2025-12-08T13:14:17.633

SOURCES RELEASE DATE

db:CNVDid:CNVD-2025-20711date:2025-09-05T00:00:00
db:VULMONid:CVE-2023-40899date:2023-08-24T00:00:00
db:JVNDBid:JVNDB-2023-022706date:2024-01-24T00:00:00
db:NVDid:CVE-2023-40899date:2023-08-24T18:15:08.113