CVE-2026-5212

| EUVD-2026-17662 HIGH
2026-03-31 VulDB GHSA-42h9-h8r4-fwqg
7.4
CVSS 4.0
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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/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

4
PoC Detected
Apr 02, 2026 - 17:15 vuln.today
Public exploit code
Analysis Generated
Mar 31, 2026 - 20:31 vuln.today
EUVD ID Assigned
Mar 31, 2026 - 20:31 euvd
EUVD-2026-17662
CVE Published
Mar 31, 2026 - 20:15 nvd
HIGH 7.4

Tags

D-Link Stack Overflow Buffer Overflow

Description

A vulnerability has been found 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. This issue affects the function Webdav_Upload_File of the file /cgi-bin/webdav_mgr.cgi. The manipulation of the argument f_file leads to stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used.

Analysis

Stack-based buffer overflow in D-Link NAS devices enables authenticated remote attackers to execute arbitrary code with full system privileges. Affecting 20+ end-of-life D-Link DNS and DNR network storage models through firmware version 20260205, the flaw resides in the Webdav_Upload_File function within /cgi-bin/webdav_mgr.cgi. …

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Remediation

Within 24 hours: Inventory all D-Link DNS and DNR NAS devices in production; verify firmware versions against 20260205 baseline and identify which models are affected per vendor's published vulnerability scope. Within 7 days: Implement network segmentation to restrict WebDAV management access (/cgi-bin/webdav_mgr.cgi) to trusted administrative networks only; disable WebDAV entirely if not operationally required. …

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Priority Score

57
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +37
POC: +20

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CVE-2026-5212 vulnerability details – vuln.today
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