Details of VAR-202511-0384

ID

VAR-202511-0384

CVE

CVE-2025-60685

TITLE

TOTOLINK of A720R Stack-based buffer overflow vulnerability in firmware

Trust: 0.8

sources: JVNDB: JVNDB-2025-019493

DESCRIPTION

A stack buffer overflow exists in the ToToLink A720R Router firmware V4.1.5cu.614_B20230630 within the sysconf binary (sub_401EE0 function). The binary reads the /proc/stat file using fgets() into a local buffer and subsequently parses the line using sscanf() into a single-byte variable with the %s format specifier. Maliciously crafted /proc/stat content can overwrite adjacent stack memory, potentially allowing an attacker with filesystem write privileges to execute arbitrary code on the device. TOTOLINK of A720R A stack-based buffer overflow vulnerability exists in the firmware.Information is obtained and service operation is interrupted (DoS) It may be in a state. The TOTOLINK A720R is a wireless router launched by TOTOLINK, a Chinese electronics company. It features dual-band Wi-Fi and emphasizes high-speed network and signal coverage. This vulnerability stems from a failure to properly validate the length of input data in the sysconf binary. Detailed vulnerability information is currently unavailable

Trust: 2.16

sources: NVD: CVE-2025-60685 // JVNDB: JVNDB-2025-019493 // CNVD: CNVD-2025-29712

IOT TAXONOMY

category:

['Network device']

sub_category:

Trust: 0.6

sources: CNVD: CNVD-2025-29712

AFFECTED PRODUCTS

vendor:	totolink	model:	a720r	scope:	eq	version:	4.1.5cu.614_b20230630	Trust: 1.0
vendor:	totolink	model:	a720r	scope:	eq	version:	-	Trust: 0.8
vendor:	totolink	model:	a720r	scope:	eq	version:	a720r firmware 4.1.5cu.614 b20230630	Trust: 0.8
vendor:	totolink	model:	a720r	scope:	-	version:	-	Trust: 0.8
vendor:	totolink	model:	a720r v4.1.5cu.614 b20230630	scope:	-	version:	-	Trust: 0.6

sources: CNVD: CNVD-2025-29712 // JVNDB: JVNDB-2025-019493 // NVD: CVE-2025-60685

CVSS

SEVERITY

CVSSV2

CVSSV3

134c704f-9b21-4f2e-91b3-4a467353bcc0:	CVE-2025-60685
value:	MEDIUM
Trust: 1.0
OTHER:	JVNDB-2025-019493
value:	MEDIUM
Trust: 0.8
CNVD:	CNVD-2025-29712
value:	LOW
Trust: 0.6

CNVD:	CNVD-2025-29712
severity:	LOW
baseScore:	3.6
vectorString:	AV:L/AC:L/AU:N/C:P/I:N/A:P
accessVector:	LOCAL
accessComplexity:	LOW
authentication:	NONE
confidentialityImpact:	PARTIAL
integrityImpact:	NONE
availabilityImpact:	PARTIAL
exploitabilityScore:	3.9
impactScore:	4.9
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 0.6

134c704f-9b21-4f2e-91b3-4a467353bcc0:	CVE-2025-60685
baseSeverity:	MEDIUM
baseScore:	5.1
vectorString:	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
attackVector:	LOCAL
attackComplexity:	LOW
privilegesRequired:	NONE
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	LOW
integrityImpact:	NONE
availabilityImpact:	LOW
exploitabilityScore:	2.5
impactScore:	2.5
version:	3.1
Trust: 1.0
OTHER:	JVNDB-2025-019493
baseSeverity:	MEDIUM
baseScore:	5.1
vectorString:	CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
attackVector:	LOCAL
attackComplexity:	LOW
privilegesRequired:	NONE
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	LOW
integrityImpact:	NONE
availabilityImpact:	LOW
exploitabilityScore:	NONE
impactScore:	NONE
version:	3.0
Trust: 0.8

sources: CNVD: CNVD-2025-29712 // JVNDB: JVNDB-2025-019493 // NVD: CVE-2025-60685

PROBLEMTYPE DATA

problemtype:	CWE-121	Trust: 1.0
problemtype:	Stack-based buffer overflow (CWE-121) [ others ]	Trust: 0.8

sources: JVNDB: JVNDB-2025-019493 // NVD: CVE-2025-60685

EXTERNAL IDS

db:	NVD	id:	CVE-2025-60685	Trust: 3.2
db:	JVNDB	id:	JVNDB-2025-019493	Trust: 0.8
db:	CNVD	id:	CNVD-2025-29712	Trust: 0.6

sources: CNVD: CNVD-2025-29712 // JVNDB: JVNDB-2025-019493 // NVD: CVE-2025-60685

REFERENCES

url:	https://github.com/yifan20020708/sgtaint-0-day/blob/main/totolink/totolink-a720r/cve-2025-60685.md	Trust: 1.8
url:	https://www.totolink.net/	Trust: 1.8
url:	https://nvd.nist.gov/vuln/detail/cve-2025-60685	Trust: 1.4
url:	http://totolink.com	Trust: 1.0

sources: CNVD: CNVD-2025-29712 // JVNDB: JVNDB-2025-019493 // NVD: CVE-2025-60685

SOURCES

db:	CNVD	id:	CNVD-2025-29712
db:	JVNDB	id:	JVNDB-2025-019493
db:	NVD	id:	CVE-2025-60685

LAST UPDATE DATE

2025-12-19T22:38:41.131000+00:00

SOURCES UPDATE DATE

db:	CNVD	id:	CNVD-2025-29712	date:	2025-12-03T00:00:00
db:	JVNDB	id:	JVNDB-2025-019493	date:	2025-11-20T03:22:00
db:	NVD	id:	CVE-2025-60685	date:	2025-11-17T21:50:14.877

SOURCES RELEASE DATE

db:	CNVD	id:	CNVD-2025-29712	date:	2025-12-02T00:00:00
db:	JVNDB	id:	JVNDB-2025-019493	date:	2025-11-20T00:00:00
db:	NVD	id:	CVE-2025-60685	date:	2025-11-13T16:15:52.470