PT-2026-25591 · D Link · Dnr-202L+18

Pjqwudi · Published 2026-03-16 · Updated 2026-03-16 · CVE-2026-4211

X.com · Ptdbugs

CVSS v2.0

9.0

9.0

High

Base vector

AV:N/AC:L/Au:S/C:C/I:C/A:C

D-Link DNS-1550-04 local backup mgr.cgi Local Backup Info stack-based overflow

CVE: CVE-2026-4211 Vendor: D-link Product: DNS-120 CVSS: 8.7 Credits: pjqwudi (VulDB User)

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.

References: • https://t.co/RgcdQlciqn • https://t.co/NAV8fBT9zg • https://t.co/EMeMEA76Mj • https://t.co/A5KENGiFxU • https://t.co/dhXoWjL00s • https://t.co/ivXm3DCcDT

#dbugs vuln

Exploit

Fix

Stack Overflow

Buffer Overflow

Weakness Enumeration

CWE-121

CWE-119

Related Identifiers

CVE-2026-4211

Affected Products

Dnr-202L

Dnr-322L

Dnr-326

Dns-1100-4

Dns-120

Dns-1200-05

Dns-1550-04

Dns-315L

Dns-320

Dns-320L

Dns-321

Dns-323

Dns-325

Dns-326

Dns-327L

Dns-340L

Dns-343

Dns-345

Dns-726-4

References · 9

• 🔥❌ https://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_160/160.md · Exploit, Deleted
• https://nvd.nist.gov/vuln/detail/CVE-2026-4211 · Security Note
• https://twitter.com/CveFindCom/status/2033585011006263302 · Twitter Post
• https://dlink.com · Note
• https://twitter.com/cyberbivash/status/2033421210013299005 · Twitter Post
• https://vuldb.com/?submit.770441 · Note
• https://twitter.com/ptdbugs/status/2033448265518100821 · Twitter Post
• https://vuldb.com/?id.351122 · Note
• https://vuldb.com/?ctiid.351122 · Note