CVE-2026-4211

high-risk
Published 2026-03-16

A weakness has been identified 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. Affected by this issue is the function Local_Backup_Info of the file /cgi-bin/local_backup_mgr.cgi. This manipulation of the argument f_idx causes stack-based buffer overflow. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks.

Do I need to act?

-
0.05% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.8/10 High
NETWORK / LOW complexity

Affected Products (20)

Affected Vendors

Dlink

References (5)

Exploit https://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_160/160.md
Permissions Required https://vuldb.com/?ctiid.351122
Third Party Advisory https://vuldb.com/?id.351122
Third Party Advisory https://vuldb.com/?submit.770441
Product https://www.dlink.com/
50
/ 100
high-risk
Severity 30/34 · Critical
Exploitability 0/34 · Minimal
Exposure 20/34 · Moderate