Details of VAR-202509-0010

ID

VAR-202509-0010

CVE

CVE-2025-9780

TITLE

TOTOLINK of A702R Buffer error vulnerability in firmware

Trust: 0.8

sources: JVNDB: JVNDB-2025-013159

DESCRIPTION

A flaw has been found in TOTOLINK A702R 4.0.0-B20211108.1423. Affected by this issue is the function sub_419BE0 of the file /boafrm/formIpQoS. This manipulation of the argument mac causes buffer overflow. The attack can be initiated remotely. The exploit has been published 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 manufactured by China's TOTOLINK Electronics, primarily used for home network connectivity and signal coverage. The TOTOLINK A702R suffers from a buffer overflow vulnerability caused by a failure to properly validate the length of input data in the parameter mac in the file /boafrm/formIpQoS. This vulnerability could allow an attacker to execute arbitrary code on the system or cause a denial of service

Trust: 2.16

sources: NVD: CVE-2025-9780 // JVNDB: JVNDB-2025-013159 // CNVD: CNVD-2025-20789

IOT TAXONOMY

category:

['Network device']

sub_category:

Trust: 0.6

sources: CNVD: CNVD-2025-20789

AFFECTED PRODUCTS

vendor:	totolink	model:	a702r	scope:	eq	version:	4.0.0-b20211108.1423	Trust: 1.0
vendor:	totolink	model:	a702r	scope:	eq	version:	a702r firmware 4.0.0-b20211108.1423	Trust: 0.8
vendor:	totolink	model:	a702r	scope:	eq	version:	-	Trust: 0.8
vendor:	totolink	model:	a702r	scope:	-	version:	-	Trust: 0.8
vendor:	totolink	model:	a702r 4.0.0-b20211108.1423	scope:	-	version:	-	Trust: 0.6

sources: CNVD: CNVD-2025-20789 // JVNDB: JVNDB-2025-013159 // NVD: CVE-2025-9780

CVSS

SEVERITY

CVSSV2

CVSSV3

cna@vuldb.com:	CVE-2025-9780
value:	HIGH
Trust: 1.0
OTHER:	JVNDB-2025-013159
value:	HIGH
Trust: 0.8
CNVD:	CNVD-2025-20789
value:	HIGH
Trust: 0.6

cna@vuldb.com:	CVE-2025-9780
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-2025-013159
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-2025-20789
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-2025-9780
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-2025-013159
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-2025-20789 // JVNDB: JVNDB-2025-013159 // NVD: CVE-2025-9780

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-2025-013159 // NVD: CVE-2025-9780

EXTERNAL IDS

db:	NVD	id:	CVE-2025-9780	Trust: 3.2
db:	VULDB	id:	322082	Trust: 1.8
db:	JVNDB	id:	JVNDB-2025-013159	Trust: 0.8
db:	CNVD	id:	CNVD-2025-20789	Trust: 0.6

sources: CNVD: CNVD-2025-20789 // JVNDB: JVNDB-2025-013159 // NVD: CVE-2025-9780

REFERENCES

url:	https://vuldb.com/?id.322082	Trust: 1.8
url:	https://vuldb.com/?submit.640988	Trust: 1.8
url:	https://www.totolink.net/	Trust: 1.8
url:	https://nvd.nist.gov/vuln/detail/cve-2025-9780	Trust: 1.4
url:	https://github.com/rew1x/cve/blob/main/totolink/a702r/formipqos/formipqos.md	Trust: 1.0
url:	https://github.com/rew1x/cve/blob/main/totolink/a702r/formipqos/formipqos.md#poc	Trust: 1.0
url:	https://vuldb.com/?ctiid.322082	Trust: 1.0

sources: CNVD: CNVD-2025-20789 // JVNDB: JVNDB-2025-013159 // NVD: CVE-2025-9780

SOURCES

db:	CNVD	id:	CNVD-2025-20789
db:	JVNDB	id:	JVNDB-2025-013159
db:	NVD	id:	CVE-2025-9780

LAST UPDATE DATE

2025-09-10T23:30:18.582000+00:00

SOURCES UPDATE DATE

db:	CNVD	id:	CNVD-2025-20789	date:	2025-09-09T00:00:00
db:	JVNDB	id:	JVNDB-2025-013159	date:	2025-09-05T09:32:00
db:	NVD	id:	CVE-2025-9780	date:	2025-09-04T16:42:51.847

SOURCES RELEASE DATE

db:	CNVD	id:	CNVD-2025-20789	date:	2025-09-08T00:00:00
db:	JVNDB	id:	JVNDB-2025-013159	date:	2025-09-05T00:00:00
db:	NVD	id:	CVE-2025-9780	date:	2025-09-01T13:15:33.987