Details of VAR-202308-3567

ID

VAR-202308-3567

CVE

CVE-2023-40842

TITLE

Tenda AC6 R7WebsSecurityHandler function buffer overflow vulnerability

Trust: 0.6

sources: CNVD: CNVD-2025-21384

DESCRIPTION

Tengda AC6 US_AC6V1.0BR_V15.03.05.16_multi_TD01.bin is vulnerable to Buffer Overflow via function "R7WebsSecurityHandler.". The Tenda AC6 is a dual-band wireless router from Tenda. It supports both 2.4GHz and 5GHz bands, boasts a maximum transmission rate of 1167Mbps, and features dual-band integration. The Tenda AC6 suffers from a buffer overflow vulnerability caused by the R7WebsSecurityHandler function's failure to properly validate the length of input data. An attacker could exploit this vulnerability to execute arbitrary code or cause a denial of service

Trust: 1.53

sources: NVD: CVE-2023-40842 // CNVD: CNVD-2025-21384 // VULMON: CVE-2023-40842

IOT TAXONOMY

category:

['Network device']

sub_category:

Trust: 0.6

sources: CNVD: CNVD-2025-21384

AFFECTED PRODUCTS

vendor:	tenda	model:	ac6	scope:	eq	version:	15.03.05.16	Trust: 1.0
vendor:	tenda	model:	ac6 us ac6v1.0br v15.03.05.16 multi td01.bin	scope:	-	version:	-	Trust: 0.6

sources: CNVD: CNVD-2025-21384 // NVD: CVE-2023-40842

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov:	CVE-2023-40842
value:	CRITICAL
Trust: 1.0
CNVD:	CNVD-2025-21384
value:	HIGH
Trust: 0.6

CNVD:	CNVD-2025-21384
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-2023-40842
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

sources: CNVD: CNVD-2025-21384 // NVD: CVE-2023-40842

PROBLEMTYPE DATA

problemtype:

CWE-787

Trust: 1.0

sources: NVD: CVE-2023-40842

PATCH

title:

Patch for Tenda AC6 R7WebsSecurityHandler function buffer overflow vulnerability

url:

https://www.cnvd.org.cn/patchInfo/show/732216

Trust: 0.6

sources: CNVD: CNVD-2025-21384

EXTERNAL IDS

db:	NVD	id:	CVE-2023-40842	Trust: 1.7
db:	CNVD	id:	CNVD-2025-21384	Trust: 0.6
db:	VULMON	id:	CVE-2023-40842	Trust: 0.1

sources: CNVD: CNVD-2025-21384 // VULMON: CVE-2023-40842 // NVD: CVE-2023-40842

REFERENCES

url:	https://github.com/xyiym/digging/blob/main/tenda/ac6/bof/4/4.md	Trust: 1.7
url:	https://nvd.nist.gov	Trust: 0.1

sources: CNVD: CNVD-2025-21384 // VULMON: CVE-2023-40842 // NVD: CVE-2023-40842

SOURCES

db:	CNVD	id:	CNVD-2025-21384
db:	VULMON	id:	CVE-2023-40842
db:	NVD	id:	CVE-2023-40842

LAST UPDATE DATE

2025-09-18T23:09:14.722000+00:00

SOURCES UPDATE DATE

db:	CNVD	id:	CNVD-2025-21384	date:	2025-09-17T00:00:00
db:	VULMON	id:	CVE-2023-40842	date:	2023-08-31T00:00:00
db:	NVD	id:	CVE-2023-40842	date:	2023-09-07T14:13:05.397

SOURCES RELEASE DATE

db:	CNVD	id:	CNVD-2025-21384	date:	2025-09-15T00:00:00
db:	VULMON	id:	CVE-2023-40842	date:	2023-08-30T00:00:00
db:	NVD	id:	CVE-2023-40842	date:	2023-08-30T17:15:10.640