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CVE-2026-4203 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CNA: [email protected]CVSS-B:6.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URL	Source(s)	Tag(s)
https://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_122/122.md	[email protected]	ExploitThird Party Advisory
https://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_123/123.md	[email protected]	ExploitThird Party Advisory
https://vuldb.com/?ctiid.351115	[email protected]	Permissions RequiredVDB Entry
https://vuldb.com/?id.351115	[email protected]	Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.770401	[email protected]	Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.770402	[email protected]	Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.770403	[email protected]	Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.770404	[email protected]	Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.770405	[email protected]	Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.770406	[email protected]	Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.770407	[email protected]	Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.770408	[email protected]	Third Party AdvisoryVDB Entry
https://www.dlink.com/	[email protected]	Product

see all 13 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-77	Improper Neutralization of Special Elements used in a Command ('Command Injection')	[email protected]
CWE-74	Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')	[email protected]
CWE-77	Improper Neutralization of Special Elements used in a Command ('Command Injection')	[email protected]

Affected Products

Product	Versions
dlink dnr-202l firmware	<= 2026-02-05
CPE cpe:2.3:o:dlink:dnr-202l_firmware:::::::: Remediation No remediation found in references.
dlink dnr-202l	All versions
CPE cpe:2.3:h:dlink:dnr-202l:-:::::::* Remediation No remediation found in references.
dlink dnr-326 firmware	<= 2026-02-05
CPE cpe:2.3:o:dlink:dnr-326_firmware:::::::: Remediation No remediation found in references.
dlink dnr-326	All versions
CPE cpe:2.3:h:dlink:dnr-326:-:::::::* Remediation No remediation found in references.
dlink dns-1100-4 firmware	<= 2026-02-05
CPE cpe:2.3:o:dlink:dns-1100-4_firmware:::::::: Remediation No remediation found in references.
dlink dns-1100-4	All versions
CPE cpe:2.3:h:dlink:dns-1100-4:-:::::::* Remediation No remediation found in references.
dlink dns-120 firmware	<= 2026-02-05
CPE cpe:2.3:o:dlink:dns-120_firmware:::::::: Remediation No remediation found in references.
dlink dns-120	All versions
CPE cpe:2.3:h:dlink:dns-120:-:::::::* Remediation No remediation found in references.
dlink dns-1200-05 firmware	<= 2026-02-05
CPE cpe:2.3:o:dlink:dns-1200-05_firmware:::::::: Remediation No remediation found in references.
dlink dns-1200-05	All versions
CPE cpe:2.3:h:dlink:dns-1200-05:-:::::::* Remediation No remediation found in references.
dlink dns-1550-04 firmware	<= 2026-02-05
CPE cpe:2.3:o:dlink:dns-1550-04_firmware:::::::: Remediation No remediation found in references.
dlink dns-1550-04	All versions
CPE cpe:2.3:h:dlink:dns-1550-04:-:::::::* Remediation No remediation found in references.
dlink dns-315l firmware	<= 2026-02-05
CPE cpe:2.3:o:dlink:dns-315l_firmware:::::::: Remediation No remediation found in references.
dlink dns-315l	All versions
CPE cpe:2.3:h:dlink:dns-315l:-:::::::* Remediation No remediation found in references.
dlink dns-320 firmware	<= 2026-02-05
CPE cpe:2.3:o:dlink:dns-320_firmware:::::::: Remediation No remediation found in references.
dlink dns-320	All versions
CPE cpe:2.3:h:dlink:dns-320:-:::::::* Remediation No remediation found in references.
dlink dns-320l firmware	<= 2026-02-05
CPE cpe:2.3:o:dlink:dns-320l_firmware:::::::: Remediation No remediation found in references.
dlink dns-320l	All versions
CPE cpe:2.3:h:dlink:dns-320l:-:::::::* Remediation No remediation found in references.
dlink dns-320lw firmware	<= 2026-02-05
CPE cpe:2.3:o:dlink:dns-320lw_firmware:::::::: Remediation No remediation found in references.
dlink dns-320lw	All versions
CPE cpe:2.3:h:dlink:dns-320lw:-:::::::* Remediation No remediation found in references.
dlink dns-321 firmware	<= 2026-02-05
CPE cpe:2.3:o:dlink:dns-321_firmware:::::::: Remediation No remediation found in references.
dlink dns-321	All versions
CPE cpe:2.3:h:dlink:dns-321:-:::::::* Remediation No remediation found in references.
dlink dns-322l firmware	<= 2026-02-05
CPE cpe:2.3:o:dlink:dns-322l_firmware:::::::: Remediation No remediation found in references.
dlink dns-322l	All versions
CPE cpe:2.3:h:dlink:dns-322l:-:::::::* Remediation No remediation found in references.
dlink dns-323 firmware	<= 2026-02-05
CPE cpe:2.3:o:dlink:dns-323_firmware:::::::: Remediation No remediation found in references.
dlink dns-323	All versions
CPE cpe:2.3:h:dlink:dns-323:-:::::::* Remediation No remediation found in references.
dlink dns-325 firmware	<= 2026-02-05
CPE cpe:2.3:o:dlink:dns-325_firmware:::::::: Remediation No remediation found in references.
dlink dns-325	All versions
CPE cpe:2.3:h:dlink:dns-325:-:::::::* Remediation No remediation found in references.
dlink dns-326 firmware	<= 2026-02-05
CPE cpe:2.3:o:dlink:dns-326_firmware:::::::: Remediation No remediation found in references.
dlink dns-326	All versions
CPE cpe:2.3:h:dlink:dns-326:-:::::::* Remediation No remediation found in references.
dlink dns-327l firmware	<= 2026-02-05
CPE cpe:2.3:o:dlink:dns-327l_firmware:::::::: Remediation No remediation found in references.
dlink dns-327l	All versions
CPE cpe:2.3:h:dlink:dns-327l:-:::::::* Remediation No remediation found in references.
dlink dns-340l firmware	<= 2026-02-05
CPE cpe:2.3:o:dlink:dns-340l_firmware:::::::: Remediation No remediation found in references.
dlink dns-340l	All versions
CPE cpe:2.3:h:dlink:dns-340l:-:::::::* Remediation No remediation found in references.
dlink dns-343 firmware	<= 2026-02-05
CPE cpe:2.3:o:dlink:dns-343_firmware:::::::: Remediation No remediation found in references.
dlink dns-343	All versions
CPE cpe:2.3:h:dlink:dns-343:-:::::::* Remediation No remediation found in references.
dlink dns-345 firmware	<= 2026-02-05
CPE cpe:2.3:o:dlink:dns-345_firmware:::::::: Remediation No remediation found in references.
dlink dns-345	All versions
CPE cpe:2.3:h:dlink:dns-345:-:::::::* Remediation No remediation found in references.
dlink dns-726-4 firmware	<= 2026-02-05
CPE cpe:2.3:o:dlink:dns-726-4_firmware:::::::: Remediation No remediation found in references.
dlink dns-726-4	All versions
CPE cpe:2.3:h:dlink:dns-726-4:-:::::::* Remediation No remediation found in references.

Change History

5 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Apr 29, 2026	Data Remediation	[email protected]
Mar 19, 2026	Initial Analysis	[email protected]
Mar 16, 2026	New CVE Received	[email protected]

CVE-2026-4203 Details

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