CVE-2026-4211CWE-119CWE-121

D-Link DNS-1550-04 local_backup_mgr.cgi Local_Backup_Info stack-based overflow

High · published March 16, 2026

CVSS v4.0
8.7
EPSS
1%
Percentile
73.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
EPSS
0.01460 · 73.4th percentile
Weaknesses
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer; CWE-121 · Stack-based Buffer Overflow
Published
2026-03-16T03:32Z
EPSS history
Timeline
  • 16 MAR 03:32Z
    D-Link DNS-1550-04 local_backup_mgr.cgi Local_Backup_Info stack-based overflow
    cvelistv5