Vulnerability Intelligence Report
D-Link DNS-1550-04 gui_mgr.cgi cgi_myfavorite_verify stack-based overflow
CVE-2026-4213
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. This vulnerability affects the function cgi_myfavorite_del_user/cgi_myfavorite_verify of the file /cgi-bin/gui_mgr.cgi. Performing a manipulation results in stack-based buffer overflow. The attack may be initiated remotely. The exploit is now public and may be used.
No Active Exploit Signals
CVSS Base Score
8.7
HIGH
EPSS Probability:0.74%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
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Weaponization
—
SSVC Action
—
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| D-Link | DNS-120 | 20260205 (affected) |
| D-Link | DNR-202L | 20260205 (affected) |
| D-Link | DNS-315L | 20260205 (affected) |
| D-Link | DNS-320 | 20260205 (affected) |
| D-Link | DNS-320L | 20260205 (affected) |
| D-Link | DNS-320LW | 20260205 (affected) |
| D-Link | DNS-321 | 20260205 (affected) |
| D-Link | DNR-322L | 20260205 (affected) |
| D-Link | DNS-323 | 20260205 (affected) |
| D-Link | DNS-325 | 20260205 (affected) |
| D-Link | DNS-326 | 20260205 (affected) |
| D-Link | DNS-327L | 20260205 (affected) |
| D-Link | DNR-326 | 20260205 (affected) |
| D-Link | DNS-340L | 20260205 (affected) |
| D-Link | DNS-343 | 20260205 (affected) |
| D-Link | DNS-345 | 20260205 (affected) |
| D-Link | DNS-726-4 | 20260205 (affected) |
| D-Link | DNS-1100-4 | 20260205 (affected) |
| D-Link | DNS-1200-05 | 20260205 (affected) |
| D-Link | DNS-1550-04 | 20260205 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
0.744%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | VulDB · Researcher · Switzerland |
| Reserved | 2026-03-15T12:02:52 |
| Published | 2026-03-16T04:02:09 |
| Last Updated | 2026-03-16T14:40:37 |
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