Details of VAR-202603-1883

ID

VAR-202603-1883

CVE

CVE-2026-4211

TITLE

D-Link Corporation of dnr-202l Multiple vulnerabilities in multiple products, including firmware

Trust: 0.8

sources: JVNDB: JVNDB-2026-008217

DESCRIPTION

A weakness has been identified in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, DNR-322L, DNS-323, DNS-325, DNS-326, DNS-327L, DNR-326, DNS-340L, DNS-343, DNS-345, DNS-726-4, DNS-1100-4, DNS-1200-05 and DNS-1550-04 up to 20260205. Affected by this issue is the function Local_Backup_Info of the file /cgi-bin/local_backup_mgr.cgi. This manipulation of the argument f_idx causes stack-based buffer overflow. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks. D-Link of DNS-120 , DNR-202L , DNS-315L , DNS-320 , DNS-320L , DNS-320LW , DNS-321 , DNR-322L , DNS-323 , DNS-325 , DNS-326 , DNS-327L , DNR-326 , DNS-340L , DNS-343 , DNS-345 , DNS-726-4 , DNS-1100-4 , DNS-1200-05 and DNS-1550-04 (( 2026 Year 2 Moon 5 A vulnerability has been identified in the version up to [date]. This attack can be performed remotely and is vulnerable to exploitation as the exploit has been exposed.All information handled by the software may be leaked to the outside. All information handled by the software may be rewritten. Furthermore, the software may stop working completely

Trust: 1.62

sources: NVD: CVE-2026-4211 // JVNDB: JVNDB-2026-008217

AFFECTED PRODUCTS

vendor:	dlink	model:	dns-327l	scope:	lte	version:	2026-02-05	Trust: 1.0
vendor:	dlink	model:	dns-1100-4	scope:	lte	version:	2026-02-05	Trust: 1.0
vendor:	dlink	model:	dns-343	scope:	lte	version:	2026-02-05	Trust: 1.0
vendor:	dlink	model:	dns-345	scope:	lte	version:	2026-02-05	Trust: 1.0
vendor:	dlink	model:	dnr-326	scope:	lte	version:	2026-02-05	Trust: 1.0
vendor:	dlink	model:	dns-1550-04	scope:	lte	version:	2026-02-05	Trust: 1.0
vendor:	dlink	model:	dns-321	scope:	lte	version:	2026-02-05	Trust: 1.0
vendor:	dlink	model:	dns-325	scope:	lte	version:	2026-02-05	Trust: 1.0
vendor:	dlink	model:	dns-120	scope:	lte	version:	2026-02-05	Trust: 1.0
vendor:	dlink	model:	dns-315l	scope:	lte	version:	2026-02-05	Trust: 1.0
vendor:	dlink	model:	dns-323	scope:	lte	version:	2026-02-05	Trust: 1.0
vendor:	dlink	model:	dns-326	scope:	lte	version:	2026-02-05	Trust: 1.0
vendor:	dlink	model:	dns-340l	scope:	lte	version:	2026-02-05	Trust: 1.0
vendor:	dlink	model:	dns-320l	scope:	lte	version:	2026-02-05	Trust: 1.0
vendor:	dlink	model:	dns-320lw	scope:	lte	version:	2026-02-05	Trust: 1.0
vendor:	dlink	model:	dns-726-4	scope:	lte	version:	2026-02-05	Trust: 1.0
vendor:	dlink	model:	dnr-202l	scope:	lte	version:	2026-02-05	Trust: 1.0
vendor:	dlink	model:	dns-322l	scope:	lte	version:	2026-02-05	Trust: 1.0
vendor:	dlink	model:	dns-1200-05	scope:	lte	version:	2026-02-05	Trust: 1.0
vendor:	dlink	model:	dns-320	scope:	lte	version:	2026-02-05	Trust: 1.0
vendor:	d link	model:	dns-315l	scope:	-	version:	-	Trust: 0.8
vendor:	d link	model:	d-link dnr-326	scope:	-	version:	-	Trust: 0.8
vendor:	d link	model:	dnr-202l	scope:	-	version:	-	Trust: 0.8
vendor:	d link	model:	d-link dns-322l	scope:	-	version:	-	Trust: 0.8
vendor:	d link	model:	d-link dns-345	scope:	-	version:	-	Trust: 0.8
vendor:	d link	model:	d-link dns-320lw	scope:	-	version:	-	Trust: 0.8
vendor:	d link	model:	dns-326	scope:	-	version:	-	Trust: 0.8
vendor:	d link	model:	dns-343	scope:	-	version:	-	Trust: 0.8
vendor:	d link	model:	dns-321	scope:	-	version:	-	Trust: 0.8
vendor:	d link	model:	d-link dns-327l	scope:	-	version:	-	Trust: 0.8
vendor:	d link	model:	dns-1100-4	scope:	-	version:	-	Trust: 0.8
vendor:	d link	model:	dns-340l	scope:	-	version:	-	Trust: 0.8
vendor:	d link	model:	d-link dns-320l	scope:	-	version:	-	Trust: 0.8
vendor:	d link	model:	dns-323	scope:	-	version:	-	Trust: 0.8
vendor:	d link	model:	dns-120	scope:	-	version:	-	Trust: 0.8
vendor:	d link	model:	dns-1200-05	scope:	-	version:	-	Trust: 0.8
vendor:	d link	model:	dns-726-4	scope:	-	version:	-	Trust: 0.8
vendor:	d link	model:	d-link dns-320	scope:	-	version:	-	Trust: 0.8
vendor:	d link	model:	dns-1550-04	scope:	-	version:	-	Trust: 0.8
vendor:	d link	model:	d-link dns-325	scope:	-	version:	-	Trust: 0.8

sources: JVNDB: JVNDB-2026-008217 // NVD: CVE-2026-4211

CVSS

SEVERITY

CVSSV2

CVSSV3

cna@vuldb.com:	CVE-2026-4211
value:	HIGH
Trust: 1.0
nvd@nist.gov:	CVE-2026-4211
value:	CRITICAL
Trust: 1.0
OTHER:	JVNDB-2026-008217
value:	CRITICAL
Trust: 0.8

cna@vuldb.com:	CVE-2026-4211
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-2026-008217
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

cna@vuldb.com:	CVE-2026-4211
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
nvd@nist.gov:	CVE-2026-4211
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:	JVNDB-2026-008217
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: JVNDB: JVNDB-2026-008217 // NVD: CVE-2026-4211 // NVD: CVE-2026-4211

PROBLEMTYPE DATA

problemtype:	CWE-121	Trust: 1.0
problemtype:	CWE-119	Trust: 1.0
problemtype:	CWE-787	Trust: 1.0
problemtype:	Buffer error (CWE-119) [ others ]	Trust: 0.8
problemtype:	Stack-based buffer overflow (CWE-121) [ others ]	Trust: 0.8
problemtype:	Out-of-bounds writing (CWE-787) [NVD evaluation ]	Trust: 0.8

sources: JVNDB: JVNDB-2026-008217 // NVD: CVE-2026-4211

PATCH

title:

Submit #770441

url:

https://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_160/160.md

Trust: 0.8

sources: JVNDB: JVNDB-2026-008217

EXTERNAL IDS

db:	NVD	id:	CVE-2026-4211	Trust: 2.6
db:	VULDB	id:	351122	Trust: 1.0
db:	JVNDB	id:	JVNDB-2026-008217	Trust: 0.8

sources: JVNDB: JVNDB-2026-008217 // NVD: CVE-2026-4211

REFERENCES

url:	https://www.dlink.com/	Trust: 1.8
url:	https://github.com/wudipjq/my_vuln/blob/main/d-link8/vuln_160/160.md	Trust: 1.0
url:	https://vuldb.com/?ctiid.351122	Trust: 1.0
url:	https://vuldb.com/?id.351122	Trust: 1.0
url:	https://vuldb.com/?submit.770441	Trust: 1.0
url:	https://nvd.nist.gov/vuln/detail/cve-2026-4211	Trust: 0.8

sources: JVNDB: JVNDB-2026-008217 // NVD: CVE-2026-4211

SOURCES

db:	JVNDB	id:	JVNDB-2026-008217
db:	NVD	id:	CVE-2026-4211

LAST UPDATE DATE

2026-03-25T23:07:11.311000+00:00

SOURCES UPDATE DATE

db:	JVNDB	id:	JVNDB-2026-008217	date:	2026-03-24T05:37:00
db:	NVD	id:	CVE-2026-4211	date:	2026-03-19T14:29:21.813

SOURCES RELEASE DATE

db:	JVNDB	id:	JVNDB-2026-008217	date:	2026-03-24T00:00:00
db:	NVD	id:	CVE-2026-4211	date:	2026-03-16T14:20:07.387