Details of VAR-202209-0154

ID

VAR-202209-0154

CVE

CVE-2022-37840

TITLE

TOTOLINK of a860r Classic buffer overflow vulnerability in firmware

Trust: 0.8

sources: JVNDB: JVNDB-2022-015642

DESCRIPTION

In TOTOLINK A860R V4.1.2cu.5182_B20201027, the main function in downloadfile.cgi has a buffer overflow vulnerability. TOTOLINK of a860r Firmware has 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 A860R is a dual-band wireless router with a maximum transmission rate of 1200Mbps. It utilizes 6-antenna dual-band concurrent technology and supports remote management via a mobile app. It is suitable for small and medium-sized businesses and home network environments. No detailed vulnerability details are currently available

Trust: 2.16

sources: NVD: CVE-2022-37840 // JVNDB: JVNDB-2022-015642 // CNVD: CNVD-2025-21027

IOT TAXONOMY

category:

['Network device']

sub_category:

Trust: 0.6

sources: CNVD: CNVD-2025-21027

AFFECTED PRODUCTS

vendor:	totolink	model:	a860r	scope:	eq	version:	4.1.2cu.5182_b20201027	Trust: 1.0
vendor:	totolink	model:	a860r	scope:	-	version:	-	Trust: 0.8
vendor:	totolink	model:	a860r	scope:	eq	version:	-	Trust: 0.8
vendor:	totolink	model:	a860r	scope:	eq	version:	a860r firmware 4.1.2cu.5182 b20201027	Trust: 0.8
vendor:	totolink	model:	a860r v4.1.2cu.5182 b20201027	scope:	-	version:	-	Trust: 0.6

sources: CNVD: CNVD-2025-21027 // JVNDB: JVNDB-2022-015642 // NVD: CVE-2022-37840

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov:	CVE-2022-37840
value:	CRITICAL
Trust: 1.0
NVD:	CVE-2022-37840
value:	CRITICAL
Trust: 0.8
CNVD:	CNVD-2025-21027
value:	HIGH
Trust: 0.6
CNNVD:	CNNVD-202209-412
value:	CRITICAL
Trust: 0.6

CNVD:	CNVD-2025-21027
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-2022-37840
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-2022-37840
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-2025-21027 // CNNVD: CNNVD-202209-412 // JVNDB: JVNDB-2022-015642 // NVD: CVE-2022-37840

PROBLEMTYPE DATA

problemtype:	CWE-120	Trust: 1.0
problemtype:	Classic buffer overflow (CWE-120) [NVD evaluation ]	Trust: 0.8

sources: JVNDB: JVNDB-2022-015642 // NVD: CVE-2022-37840

THREAT TYPE

remote

Trust: 0.6

sources: CNNVD: CNNVD-202209-412

TYPE

other

Trust: 0.6

sources: CNNVD: CNNVD-202209-412

EXTERNAL IDS

db:	NVD	id:	CVE-2022-37840	Trust: 3.8
db:	JVNDB	id:	JVNDB-2022-015642	Trust: 0.8
db:	CNVD	id:	CNVD-2025-21027	Trust: 0.6
db:	CNNVD	id:	CNNVD-202209-412	Trust: 0.6

sources: CNVD: CNVD-2025-21027 // CNNVD: CNNVD-202209-412 // JVNDB: JVNDB-2022-015642 // NVD: CVE-2022-37840

REFERENCES

url:	https://github.com/1759134370/iot/blob/main/totolink/a860r/3.md	Trust: 1.6
url:	https://nvd.nist.gov/vuln/detail/cve-2022-37840	Trust: 0.8
url:	http://m.totolink.net/portal/article/index/id/117/cid/37.html	Trust: 0.6
url:	https://cxsecurity.com/cveshow/cve-2022-37840/	Trust: 0.6

sources: CNVD: CNVD-2025-21027 // CNNVD: CNNVD-202209-412 // JVNDB: JVNDB-2022-015642 // NVD: CVE-2022-37840

SOURCES

db:	CNVD	id:	CNVD-2025-21027
db:	CNNVD	id:	CNNVD-202209-412
db:	JVNDB	id:	JVNDB-2022-015642
db:	NVD	id:	CVE-2022-37840

LAST UPDATE DATE

2025-09-12T23:32:58.532000+00:00

SOURCES UPDATE DATE

db:	CNVD	id:	CNVD-2025-21027	date:	2025-09-11T00:00:00
db:	CNNVD	id:	CNNVD-202209-412	date:	2022-09-09T00:00:00
db:	JVNDB	id:	JVNDB-2022-015642	date:	2023-09-28T02:28:00
db:	NVD	id:	CVE-2022-37840	date:	2022-09-08T21:00:13.083

SOURCES RELEASE DATE

db:	CNVD	id:	CNVD-2025-21027	date:	2025-09-11T00:00:00
db:	CNNVD	id:	CNNVD-202209-412	date:	2022-09-06T00:00:00
db:	JVNDB	id:	JVNDB-2022-015642	date:	2023-09-28T00:00:00
db:	NVD	id:	CVE-2022-37840	date:	2022-09-06T17:15:08.387