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CVE-2026-4211

HIGH CVSS: 8.8 Published: 2026-03-16 Modified: 2026-06-17

Description

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.

Affected Platforms

Dlink Dns-322L FirmwareDlink Dns-1100-4 FirmwareDlink Dns-345Dlink Dns-120 FirmwareDlink Dns-320Lw FirmwareDlink Dns-1550-04Dlink Dns-327L FirmwareDlink Dns-343 FirmwareDlink Dns-323Dlink Dns-340L

Weakness Type

CWE-119, CWE-121, CWE-787

References