CVE-2026-4194: D-Link Dnr-202l Firmware privilege escalation (CVSS 7.3)

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. The impacted element is the function cgi_set_wto of the file /cgi-bin/system_mgr.cgi. Performing a manipulation results in improper access controls. Remote exploitation of the attack is possible. The exploit is now public and may be used.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityLow

IntegrityLow

AvailabilityLow

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

Affected products

D-Link Dnr-202l Firmware≤ 2026-02-05

D-Link Dnr-326 Firmware≤ 2026-02-05

D-Link Dns-1100-4 Firmware≤ 2026-02-05

D-Link Dns-1200-05 Firmware≤ 2026-02-05

D-Link Dns-120 Firmware≤ 2026-02-05

D-Link Dns-1550-04 Firmware≤ 2026-02-05

D-Link Dns-315l Firmware≤ 2026-02-05

D-Link Dns-320 Firmware≤ 2026-02-05

D-Link Dns-320l Firmware≤ 2026-02-05

D-Link Dns-320lw Firmware≤ 2026-02-05

D-Link Dns-321 Firmware≤ 2026-02-05

D-Link Dns-322l Firmware≤ 2026-02-05

D-Link Dns-323 Firmware≤ 2026-02-05

D-Link Dns-325 Firmware≤ 2026-02-05

D-Link Dns-326 Firmware≤ 2026-02-05

D-Link Dns-327l Firmware≤ 2026-02-05

D-Link Dns-340l Firmware≤ 2026-02-05

D-Link Dns-343 Firmware≤ 2026-02-05

D-Link Dns-345 Firmware≤ 2026-02-05

D-Link Dns-726-4 Firmware≤ 2026-02-05

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

https://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_96/96.mdExploitThird Party Advisory
https://vuldb.com/?ctiid.351106Permissions RequiredVDB Entry
https://vuldb.com/?id.351106Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.769853Third Party AdvisoryVDB Entry
https://www.dlink.com/Product

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2026-4194 being actively exploited?

CVE-2026-4194 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 3.00%.

How severe is CVE-2026-4194?

CVE-2026-4194 has a CVSS 3.1 base score of 7.3, rated high. EPSS estimates a 3.00% probability of exploitation.

Which products are affected by CVE-2026-4194?

Affected products include D-Link Dnr-202l Firmware, D-Link Dnr-326 Firmware, D-Link Dns-1100-4 Firmware, D-Link Dns-1200-05 Firmware, D-Link Dns-120 Firmware, and 15 more.

How do I fix CVE-2026-4194?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-4194 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation works Book a demo