CVE-2026-4206

Dnr 202l Firmware vulnerability

CVSS

6.3

EPSS

3.2%

EPSS pct

87th

Exploited

No known

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.

Affected vendor

Dlink

Affected product

Dnr 202l Firmware

CVSS vector

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

Weakness type (CWE)

CWE-74 — Injection
CWE-77 — Command Injection

Published

2026-03-16

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring low privileges, no user interaction. Successful exploitation leads to low impact to confidentiality, low impact to integrity, low impact to availability.

Its EPSS score of 3.2% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 87% of all scored CVEs.

Check your external exposure to CVE-2026-4206

Confirm whether Dlink Dnr 202l Firmware is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2026-4206.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2026-4206

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2026-4206 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

Run a free external exposure scan

Are you exposed to CVE-2026-4206?

Run an instant, non-intrusive external scan to check your attack surface for CVE-2026-4206.

Start free scan

No credit card. Agentless.

Related vulnerabilities

Opensuse vulnerability

MEDIUM

CVE-2015-7674

Ubuntu Linux vulnerability