Description
A vulnerability has been 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 impacts the function cgi_recovery/cgi_backup_now/cgi_set_schedule/cgi_set_rsync_server of the file /cgi-bin/remote_backup.cgi. The manipulation leads to command injection. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used.
Published: 2026-03-15
Score: 5.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Remote Command Execution
Action: Immediate Patch
AI Analysis

Impact

The vulnerability allows the injection of arbitrary shell commands through the remote_backup.cgi script, specifically when the cgi_set_rsync_server function is invoked. This command injection can be performed over the network, granting an attacker the ability to run any command with the privileges of the web server process. The implications include full compromise of the device, unauthorized data exfiltration, manipulation of configuration settings, and potential use as a foothold for further network attacks. The weakness is identified as CWE-74 and CWE-77.

Affected Systems

Affected products include 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 (duplicate), DNS-340L, DNS-343, DNS-345, DNS-726-4, DNS-1100-4, DNS-1200-05, and DNS-1550-04, for all firmware releases up to 20260205. Users should verify if their device is running one of these models with a firmware build dated before or on this date and apply updates accordingly.

Risk and Exploitability

The CVSS score is 5.3, indicating a moderate severity. EPSS is below 1%, suggesting that public exploitation is currently unlikely, and the vulnerability is not listed in CISA's KEV catalog. The attack can be executed from a remote network location by sending specially crafted HTTP requests to /cgi-bin/remote_backup.cgi. No special local privileges are required, so any external user who can reach the device can potentially exploit this flaw.

Generated by OpenCVE AI on March 19, 2026 at 15:37 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Update the firmware of any affected D‑Link devices to a release dated after 20260205. The latest firmware versions are available on the official D‑Link website and are identified as mitigating the command‑injection issue. If a patch is not available, block or restrict external access to the /cgi-bin/remote_backup.cgi endpoint via the device’s web interface or an external firewall, thereby preventing remote commands from being injected. Disable the remote backup feature if it is unnecessary for your environment to reduce the attack surface. Verify the device’s firmware version and compare it with the patch release notes, and monitor logs for any anomalous activity. Finally, keep the device’s firmware and operating system up to date as part of a broader security maintenance plan.

Generated by OpenCVE AI on March 19, 2026 at 15:37 UTC.

Tracking

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Advisories

No advisories yet.

History

Thu, 19 Mar 2026 14:30:00 +0000

Type Values Removed Values Added
First Time appeared Dlink
Dlink dnr-202l
Dlink dnr-202l Firmware
Dlink dnr-326
Dlink dnr-326 Firmware
Dlink dns-1100-4
Dlink dns-1100-4 Firmware
Dlink dns-120
Dlink dns-1200-05
Dlink dns-1200-05 Firmware
Dlink dns-120 Firmware
Dlink dns-1550-04
Dlink dns-1550-04 Firmware
Dlink dns-315l
Dlink dns-315l Firmware
Dlink dns-320
Dlink dns-320 Firmware
Dlink dns-320l
Dlink dns-320l Firmware
Dlink dns-320lw
Dlink dns-320lw Firmware
Dlink dns-321
Dlink dns-321 Firmware
Dlink dns-322l
Dlink dns-322l Firmware
Dlink dns-323
Dlink dns-323 Firmware
Dlink dns-325
Dlink dns-325 Firmware
Dlink dns-326
Dlink dns-326 Firmware
Dlink dns-327l
Dlink dns-327l Firmware
Dlink dns-340l
Dlink dns-340l Firmware
Dlink dns-343
Dlink dns-343 Firmware
Dlink dns-345
Dlink dns-345 Firmware
Dlink dns-726-4
Dlink dns-726-4 Firmware
CPEs cpe:2.3:h:dlink:dnr-202l:-:*:*:*:*:*:*:*
cpe:2.3:h:dlink:dnr-326:-:*:*:*:*:*:*:*
cpe:2.3:h:dlink:dns-1100-4:-:*:*:*:*:*:*:*
cpe:2.3:h:dlink:dns-1200-05:-:*:*:*:*:*:*:*
cpe:2.3:h:dlink:dns-120:-:*:*:*:*:*:*:*
cpe:2.3:h:dlink:dns-1550-04:-:*:*:*:*:*:*:*
cpe:2.3:h:dlink:dns-315l:-:*:*:*:*:*:*:*
cpe:2.3:h:dlink:dns-320:-:*:*:*:*:*:*:*
cpe:2.3:h:dlink:dns-320l:-:*:*:*:*:*:*:*
cpe:2.3:h:dlink:dns-320lw:-:*:*:*:*:*:*:*
cpe:2.3:h:dlink:dns-321:-:*:*:*:*:*:*:*
cpe:2.3:h:dlink:dns-322l:-:*:*:*:*:*:*:*
cpe:2.3:h:dlink:dns-323:-:*:*:*:*:*:*:*
cpe:2.3:h:dlink:dns-325:-:*:*:*:*:*:*:*
cpe:2.3:h:dlink:dns-326:-:*:*:*:*:*:*:*
cpe:2.3:h:dlink:dns-327l:-:*:*:*:*:*:*:*
cpe:2.3:h:dlink:dns-340l:-:*:*:*:*:*:*:*
cpe:2.3:h:dlink:dns-343:-:*:*:*:*:*:*:*
cpe:2.3:h:dlink:dns-345:-:*:*:*:*:*:*:*
cpe:2.3:h:dlink:dns-726-4:-:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dnr-202l_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dnr-326_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dns-1100-4_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dns-1200-05_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dns-120_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dns-1550-04_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dns-315l_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dns-320_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dns-320l_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dns-320lw_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dns-321_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dns-322l_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dns-323_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dns-325_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dns-326_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dns-327l_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dns-340l_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dns-343_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dns-345_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dns-726-4_firmware:*:*:*:*:*:*:*:*
Vendors & Products Dlink
Dlink dnr-202l
Dlink dnr-202l Firmware
Dlink dnr-326
Dlink dnr-326 Firmware
Dlink dns-1100-4
Dlink dns-1100-4 Firmware
Dlink dns-120
Dlink dns-1200-05
Dlink dns-1200-05 Firmware
Dlink dns-120 Firmware
Dlink dns-1550-04
Dlink dns-1550-04 Firmware
Dlink dns-315l
Dlink dns-315l Firmware
Dlink dns-320
Dlink dns-320 Firmware
Dlink dns-320l
Dlink dns-320l Firmware
Dlink dns-320lw
Dlink dns-320lw Firmware
Dlink dns-321
Dlink dns-321 Firmware
Dlink dns-322l
Dlink dns-322l Firmware
Dlink dns-323
Dlink dns-323 Firmware
Dlink dns-325
Dlink dns-325 Firmware
Dlink dns-326
Dlink dns-326 Firmware
Dlink dns-327l
Dlink dns-327l Firmware
Dlink dns-340l
Dlink dns-340l Firmware
Dlink dns-343
Dlink dns-343 Firmware
Dlink dns-345
Dlink dns-345 Firmware
Dlink dns-726-4
Dlink dns-726-4 Firmware

Tue, 17 Mar 2026 10:00:00 +0000

Type Values Removed Values Added
First Time appeared D-link
D-link dnr-202l
D-link dnr-322l
D-link dnr-326
D-link dns-1100-4
D-link dns-120
D-link dns-1200-05
D-link dns-1550-04
D-link dns-315l
D-link dns-320
D-link dns-320l
D-link dns-320lw
D-link dns-321
D-link dns-323
D-link dns-325
D-link dns-326
D-link dns-327l
D-link dns-340l
D-link dns-343
D-link dns-345
D-link dns-726-4
Vendors & Products D-link
D-link dnr-202l
D-link dnr-322l
D-link dnr-326
D-link dns-1100-4
D-link dns-120
D-link dns-1200-05
D-link dns-1550-04
D-link dns-315l
D-link dns-320
D-link dns-320l
D-link dns-320lw
D-link dns-321
D-link dns-323
D-link dns-325
D-link dns-326
D-link dns-327l
D-link dns-340l
D-link dns-343
D-link dns-345
D-link dns-726-4

Mon, 16 Mar 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Mon, 16 Mar 2026 00:00:00 +0000

Type Values Removed Values Added
Description A vulnerability has been 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 impacts the function cgi_recovery/cgi_backup_now/cgi_set_schedule/cgi_set_rsync_server of the file /cgi-bin/remote_backup.cgi. The manipulation leads to command injection. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used.
Title D-Link DNS-1550-04 remote_backup.cgi cgi_set_rsync_server command injection
Weaknesses CWE-74
CWE-77
References
Metrics cvssV2_0

{'score': 6.5, 'vector': 'AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 6.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R'}

cvssV3_1

{'score': 6.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R'}

cvssV4_0

{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P'}

Subscriptions

D-link Dnr-202l Dnr-322l Dnr-326 Dns-1100-4 Dns-120 Dns-1200-05 Dns-1550-04 Dns-315l Dns-320 Dns-320l Dns-320lw Dns-321 Dns-323 Dns-325 Dns-326 Dns-327l Dns-340l Dns-343 Dns-345 Dns-726-4
Dlink Dnr-202l Dnr-202l Firmware Dnr-326 Dnr-326 Firmware Dns-1100-4 Dns-1100-4 Firmware Dns-120 Dns-1200-05 Dns-1200-05 Firmware Dns-120 Firmware Dns-1550-04 Dns-1550-04 Firmware Dns-315l Dns-315l Firmware Dns-320 Dns-320 Firmware Dns-320l Dns-320l Firmware Dns-320lw Dns-320lw Firmware Dns-321 Dns-321 Firmware Dns-322l Dns-322l Firmware Dns-323 Dns-323 Firmware Dns-325 Dns-325 Firmware Dns-326 Dns-326 Firmware Dns-327l Dns-327l Firmware Dns-340l Dns-340l Firmware Dns-343 Dns-343 Firmware Dns-345 Dns-345 Firmware Dns-726-4 Dns-726-4 Firmware
cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-03-16T14:40:35.989Z

Reserved: 2026-03-15T08:22:51.610Z

Link: CVE-2026-4196

cve-icon Vulnrichment

Updated: 2026-03-16T14:36:52.955Z

cve-icon NVD

Status : Analyzed

Published: 2026-03-16T14:20:03.730

Modified: 2026-03-19T14:22:45.087

Link: CVE-2026-4196

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-03-23T14:01:07Z

Weaknesses