Details of VAR-202308-3582

ID

VAR-202308-3582

CVE

CVE-2023-40844

TITLE

Shenzhen Tenda Technology Co.,Ltd. of AC6 Out-of-bounds write vulnerability in firmware

Trust: 0.8

sources: JVNDB: JVNDB-2023-011716

DESCRIPTION

Tenda AC6 US_AC6V1.0BR_V15.03.05.16_multi_TD01.bin is vulnerable to Buffer Overflow via function 'formWifiBasicSet.'. Shenzhen Tenda Technology Co.,Ltd. of AC6 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. 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 formWifiBasicSet function's failure to properly validate the length of input data. This vulnerability could allow an attacker to execute arbitrary code or cause a denial of service

Trust: 2.25

sources: NVD: CVE-2023-40844 // JVNDB: JVNDB-2023-011716 // CNVD: CNVD-2025-21376 // VULMON: CVE-2023-40844

IOT TAXONOMY

category:

['Network device']

sub_category:

Trust: 0.6

sources: CNVD: CNVD-2025-21376

AFFECTED PRODUCTS

vendor:	tenda	model:	ac6	scope:	eq	version:	15.03.05.16	Trust: 1.0
vendor:	tenda	model:	ac6	scope:	eq	version:	-	Trust: 0.8
vendor:	tenda	model:	ac6	scope:	eq	version:	ac6 firmware 15.03.05.16	Trust: 0.8
vendor:	tenda	model:	ac6	scope:	-	version:	-	Trust: 0.8
vendor:	tenda	model:	ac6 us ac6v1.0br v15.03.05.16 multi td01.bin	scope:	-	version:	-	Trust: 0.6

sources: CNVD: CNVD-2025-21376 // JVNDB: JVNDB-2023-011716 // NVD: CVE-2023-40844

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov:	CVE-2023-40844
value:	CRITICAL
Trust: 1.0
NVD:	CVE-2023-40844
value:	CRITICAL
Trust: 0.8
CNVD:	CNVD-2025-21376
value:	HIGH
Trust: 0.6

CNVD:	CNVD-2025-21376
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-2023-40844
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-2023-40844
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-2025-21376 // JVNDB: JVNDB-2023-011716 // NVD: CVE-2023-40844

PROBLEMTYPE DATA

problemtype:	CWE-787	Trust: 1.0
problemtype:	Out-of-bounds writing (CWE-787) [NVD evaluation ]	Trust: 0.8

sources: JVNDB: JVNDB-2023-011716 // NVD: CVE-2023-40844

PATCH

title:

Patch for Tenda AC6 formWifiBasicSet function buffer overflow vulnerability

url:

https://www.cnvd.org.cn/patchInfo/show/732176

Trust: 0.6

sources: CNVD: CNVD-2025-21376

EXTERNAL IDS

db:	NVD	id:	CVE-2023-40844	Trust: 3.3
db:	JVNDB	id:	JVNDB-2023-011716	Trust: 0.8
db:	CNVD	id:	CNVD-2025-21376	Trust: 0.6
db:	VULMON	id:	CVE-2023-40844	Trust: 0.1

sources: CNVD: CNVD-2025-21376 // VULMON: CVE-2023-40844 // JVNDB: JVNDB-2023-011716 // NVD: CVE-2023-40844

REFERENCES

url:	https://github.com/xyiym/digging/blob/main/tenda/ac6/bof/2/2.md	Trust: 2.5
url:	https://nvd.nist.gov/vuln/detail/cve-2023-40844	Trust: 0.8
url:	https://nvd.nist.gov	Trust: 0.1

sources: CNVD: CNVD-2025-21376 // VULMON: CVE-2023-40844 // JVNDB: JVNDB-2023-011716 // NVD: CVE-2023-40844

SOURCES

db:	CNVD	id:	CNVD-2025-21376
db:	VULMON	id:	CVE-2023-40844
db:	JVNDB	id:	JVNDB-2023-011716
db:	NVD	id:	CVE-2023-40844

LAST UPDATE DATE

2025-09-18T23:05:23.935000+00:00

SOURCES UPDATE DATE

db:	CNVD	id:	CNVD-2025-21376	date:	2025-09-17T00:00:00
db:	VULMON	id:	CVE-2023-40844	date:	2023-08-31T00:00:00
db:	JVNDB	id:	JVNDB-2023-011716	date:	2023-12-14T02:10:00
db:	NVD	id:	CVE-2023-40844	date:	2023-09-07T14:15:43.250

SOURCES RELEASE DATE

db:	CNVD	id:	CNVD-2025-21376	date:	2025-09-15T00:00:00
db:	VULMON	id:	CVE-2023-40844	date:	2023-08-30T00:00:00
db:	JVNDB	id:	JVNDB-2023-011716	date:	2023-12-14T00:00:00
db:	NVD	id:	CVE-2023-40844	date:	2023-08-30T17:15:10.757