CVE-2026-4211

CWE-119 — Buffer OverflowCWE-121 — Stack-based Buffer OverflowCWE-787 — Out-of-bounds Write3 documents3 sources
Severity
7.4HIGH
EPSS
0.0%
top 84.72%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
40
Dlink Dnr-202l FirmwareDlink Dnr-326 FirmwareDlink Dns-1100-4 Firmware+37 more
Timeline
PublishedMar 16

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 …

CVSS 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

Affected Packages40 packages

▶NVDdlink/dns-320lw_firmware2026-02-05
▶CVEListV5d-link/dns-320lw20260205
▶NVDdlink/dnr-202l_firmware2026-02-05
▶NVDdlink/dns-315l_firmware2026-02-05
▶NVDdlink/dns-320l_firmware2026-02-05

🔴Vulnerability Details

2
GHSA
GHSA-j655-wmx8-5w9x: 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-↗2026-03-16
▶
CVEList
D-Link DNS-1550-04 local_backup_mgr.cgi Local_Backup_Info stack-based overflow↗2026-03-16
▶