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ID

VAR-202603-1677


CVE

CVE-2026-4203


TITLE

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

Trust: 0.8

sources: JVNDB: JVNDB-2026-008224

DESCRIPTION

A vulnerability was detected 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. Impacted is the function cgi_portforwarding_add/cgi_portforwarding_del/cgi_portforwarding_modify/cgi_portforwarding_add_scan/cgi_dhcpd_lease/cgi_ddns/cgi_ip/cgi_dhcpd of the file /cgi-bin/network_mgr.cgi. The manipulation results in command injection. The attack may be launched remotely. The exploit is now public and may be used. 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 was detected (up to [date]). The exploit has already been exposed and may be exploited.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. Furthermore, attacks that exploit this vulnerability will not affect other software

Trust: 1.62

sources: NVD: CVE-2026-4203 // JVNDB: JVNDB-2026-008224

AFFECTED PRODUCTS

vendor:dlinkmodel:dns-327lscope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-1100-4scope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-343scope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-345scope:lteversion:2026-02-05

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vendor:dlinkmodel:dnr-326scope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-1550-04scope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-321scope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-325scope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-120scope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-315lscope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-323scope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-326scope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-340lscope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-320lscope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-320lwscope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-726-4scope:lteversion:2026-02-05

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vendor:dlinkmodel:dnr-202lscope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-322lscope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-1200-05scope:lteversion:2026-02-05

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vendor:dlinkmodel:dns-320scope:lteversion:2026-02-05

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vendor:d linkmodel:dns-315lscope: - version: -

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vendor:d linkmodel:d-link dnr-326scope: - version: -

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vendor:d linkmodel:dnr-202lscope: - version: -

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vendor:d linkmodel:d-link dns-322lscope: - version: -

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vendor:d linkmodel:d-link dns-345scope: - version: -

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vendor:d linkmodel:d-link dns-320lwscope: - version: -

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vendor:d linkmodel:dns-326scope: - version: -

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vendor:d linkmodel:dns-343scope: - version: -

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vendor:d linkmodel:dns-321scope: - version: -

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vendor:d linkmodel:d-link dns-327lscope: - version: -

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vendor:d linkmodel:dns-1100-4scope: - version: -

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vendor:d linkmodel:dns-340lscope: - version: -

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vendor:d linkmodel:d-link dns-320lscope: - version: -

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vendor:d linkmodel:dns-323scope: - version: -

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vendor:d linkmodel:dns-120scope: - version: -

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vendor:d linkmodel:dns-1200-05scope: - version: -

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vendor:d linkmodel:dns-726-4scope: - version: -

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vendor:d linkmodel:d-link dns-320scope: - version: -

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vendor:d linkmodel:dns-1550-04scope: - version: -

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vendor:d linkmodel:d-link dns-325scope: - version: -

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sources: JVNDB: JVNDB-2026-008224 // NVD: CVE-2026-4203

CVSS

SEVERITY

CVSSV2

CVSSV3

cna@vuldb.com: CVE-2026-4203
value: LOW

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nvd@nist.gov: CVE-2026-4203
value: CRITICAL

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OTHER: JVNDB-2026-008224
value: CRITICAL

Trust: 0.8

cna@vuldb.com: CVE-2026-4203
severity: MEDIUM
baseScore: 6.5
vectorString: AV:N/AC:L/AU:S/C:P/I:P/A:P
accessVector: NETWORK
accessComplexity: LOW
authentication: SINGLE
confidentialityImpact: PARTIAL
integrityImpact: PARTIAL
availabilityImpact: PARTIAL
exploitabilityScore: 8.0
impactScore: 6.4
acInsufInfo: NONE
obtainAllPrivilege: NONE
obtainUserPrivilege: NONE
obtainOtherPrivilege: NONE
userInteractionRequired: NONE
version: 2.0

Trust: 1.0

OTHER: JVNDB-2026-008224
severity: MEDIUM
baseScore: 6.5
vectorString: AV:N/AC:L/AU:S/C:P/I:P/A:P
accessVector: NETWORK
accessComplexity: LOW
authentication: SINGLE
confidentialityImpact: PARTIAL
integrityImpact: PARTIAL
availabilityImpact: PARTIAL
exploitabilityScore: NONE
impactScore: NONE
acInsufInfo: NONE
obtainAllPrivilege: NONE
obtainUserPrivilege: NONE
obtainOtherPrivilege: NONE
userInteractionRequired: NONE
version: 2.0

Trust: 0.8

cna@vuldb.com: CVE-2026-4203
baseSeverity: MEDIUM
baseScore: 6.3
vectorString: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: LOW
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: LOW
integrityImpact: LOW
availabilityImpact: LOW
exploitabilityScore: 2.8
impactScore: 3.4
version: 3.1

Trust: 1.0

nvd@nist.gov: CVE-2026-4203
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-2026-008224
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-2026-008224 // NVD: CVE-2026-4203 // NVD: CVE-2026-4203

PROBLEMTYPE DATA

problemtype:CWE-77

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problemtype:CWE-74

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problemtype:injection (CWE-74) [ others ]

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problemtype: Command injection (CWE-77) [NVD evaluation ]

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problemtype: Command injection (CWE-77) [ others ]

Trust: 0.8

sources: JVNDB: JVNDB-2026-008224 // NVD: CVE-2026-4203

PATCH

title:D-Link DNS-120/202L/315L/320/320L/320LW/321/322L/323/325/326/327L/326/340L/343/345/726-4/1100-4/1200-05/1550-04 up to 20260205 Command Injectionurl:https://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_122/122.md

Trust: 0.8

sources: JVNDB: JVNDB-2026-008224

EXTERNAL IDS

db:NVDid:CVE-2026-4203

Trust: 2.6

db:VULDBid:351115

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db:JVNDBid:JVNDB-2026-008224

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sources: JVNDB: JVNDB-2026-008224 // NVD: CVE-2026-4203

REFERENCES

url:https://www.dlink.com/

Trust: 1.8

url:https://vuldb.com/?ctiid.351115

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url:https://vuldb.com/?submit.770401

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url:https://github.com/wudipjq/my_vuln/blob/main/d-link8/vuln_122/122.md

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url:https://vuldb.com/?submit.770407

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url:https://github.com/wudipjq/my_vuln/blob/main/d-link8/vuln_123/123.md

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url:https://vuldb.com/?id.351115

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url:https://vuldb.com/?submit.770403

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url:https://vuldb.com/?submit.770408

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url:https://vuldb.com/?submit.770406

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url:https://vuldb.com/?submit.770405

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url:https://vuldb.com/?submit.770404

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url:https://vuldb.com/?submit.770402

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url:https://nvd.nist.gov/vuln/detail/cve-2026-4203

Trust: 0.8

sources: JVNDB: JVNDB-2026-008224 // NVD: CVE-2026-4203

SOURCES

db:JVNDBid:JVNDB-2026-008224
db:NVDid:CVE-2026-4203

LAST UPDATE DATE

2026-03-25T23:09:19.099000+00:00


SOURCES UPDATE DATE

db:JVNDBid:JVNDB-2026-008224date:2026-03-24T05:37:00
db:NVDid:CVE-2026-4203date:2026-03-19T14:23:12.530

SOURCES RELEASE DATE

db:JVNDBid:JVNDB-2026-008224date:2026-03-24T00:00:00
db:NVDid:CVE-2026-4203date:2026-03-16T14:20:05.323