Details of VAR-202507-2691

ID

VAR-202507-2691

CVE

CVE-2025-8140

TITLE

TOTOLINK of A702R Buffer error vulnerability in firmware

Trust: 0.8

sources: JVNDB: JVNDB-2025-010252

DESCRIPTION

A vulnerability was found in TOTOLINK A702R 4.0.0-B20230721.1521. It has been declared as critical. This vulnerability affects unknown code of the file /boafrm/formWlanMultipleAP of the component HTTP POST Request Handler. The manipulation of the argument submit-url leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. TOTOLINK of A702R The firmware contains a buffer error vulnerability and a classic buffer overflow vulnerability.Information is obtained, information is tampered with, and service operation is interrupted. (DoS) It may be in a state. The TOTOLINK A702R is a wireless router from TOTOLINK. An attacker could exploit this vulnerability by remotely crafting malicious data to trigger a buffer overflow, potentially causing a denial of service or arbitrary code execution

Trust: 2.16

sources: NVD: CVE-2025-8140 // JVNDB: JVNDB-2025-010252 // CNVD: CNVD-2025-17796

IOT TAXONOMY

category:

['Network device']

sub_category:

Trust: 0.6

sources: CNVD: CNVD-2025-17796

AFFECTED PRODUCTS

vendor:	totolink	model:	a702r	scope:	eq	version:	4.0.0-b20230721.1521	Trust: 1.0
vendor:	totolink	model:	a702r	scope:	-	version:	-	Trust: 0.8
vendor:	totolink	model:	a702r	scope:	eq	version:	a702r firmware 4.0.0-b20230721.1521	Trust: 0.8
vendor:	totolink	model:	a702r	scope:	eq	version:	-	Trust: 0.8
vendor:	totolink	model:	a702r 4.0.0b20230721.1521	scope:	-	version:	-	Trust: 0.6

sources: CNVD: CNVD-2025-17796 // JVNDB: JVNDB-2025-010252 // NVD: CVE-2025-8140

CVSS

SEVERITY

CVSSV2

CVSSV3

cna@vuldb.com:	CVE-2025-8140
value:	HIGH
Trust: 1.0
OTHER:	JVNDB-2025-010252
value:	HIGH
Trust: 0.8
CNVD:	CNVD-2025-17796
value:	HIGH
Trust: 0.6

cna@vuldb.com:	CVE-2025-8140
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-2025-010252
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
CNVD:	CNVD-2025-17796
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: 0.6

cna@vuldb.com:	CVE-2025-8140
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-2025-010252
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: CNVD: CNVD-2025-17796 // JVNDB: JVNDB-2025-010252 // NVD: CVE-2025-8140

PROBLEMTYPE DATA

problemtype:	CWE-120	Trust: 1.0
problemtype:	CWE-119	Trust: 1.0
problemtype:	Buffer error (CWE-119) [ others ]	Trust: 0.8
problemtype:	Classic buffer overflow (CWE-120) [ others ]	Trust: 0.8

sources: JVNDB: JVNDB-2025-010252 // NVD: CVE-2025-8140

EXTERNAL IDS

db:	NVD	id:	CVE-2025-8140	Trust: 3.2
db:	VULDB	id:	317536	Trust: 2.4
db:	JVNDB	id:	JVNDB-2025-010252	Trust: 0.8
db:	CNVD	id:	CNVD-2025-17796	Trust: 0.6

sources: CNVD: CNVD-2025-17796 // JVNDB: JVNDB-2025-010252 // NVD: CVE-2025-8140

REFERENCES

url:	https://vuldb.com/?id.317536	Trust: 2.4
url:	https://vuldb.com/?submit.620486	Trust: 2.4
url:	https://github.com/panda666-888/vuls/blob/main/totolink/a702r/formwlanmultipleap.md	Trust: 2.4
url:	https://www.totolink.net/	Trust: 2.4
url:	https://vuldb.com/?ctiid.317536	Trust: 1.6
url:	https://nvd.nist.gov/vuln/detail/cve-2025-8140	Trust: 0.8

sources: CNVD: CNVD-2025-17796 // JVNDB: JVNDB-2025-010252 // NVD: CVE-2025-8140

SOURCES

db:	CNVD	id:	CNVD-2025-17796
db:	JVNDB	id:	JVNDB-2025-010252
db:	NVD	id:	CVE-2025-8140

LAST UPDATE DATE

2025-08-09T19:36:36.212000+00:00

SOURCES UPDATE DATE

db:	CNVD	id:	CNVD-2025-17796	date:	2025-08-07T00:00:00
db:	JVNDB	id:	JVNDB-2025-010252	date:	2025-07-30T09:01:00
db:	NVD	id:	CVE-2025-8140	date:	2025-07-28T21:16:48.420

SOURCES RELEASE DATE

db:	CNVD	id:	CNVD-2025-17796	date:	2025-07-31T00:00:00
db:	JVNDB	id:	JVNDB-2025-010252	date:	2025-07-30T00:00:00
db:	NVD	id:	CVE-2025-8140	date:	2025-07-25T09:15:28.573