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CVE-2026-5212

HIGH CVSS 4.0: 7.4 EPSS 0.10%
Updated Apr 02, 2026
Dlink
Parameter Value
CVSS 7.4 (HIGH)
Affected Versions before 2026-02-05
Type CWE-121 (Stack-based Buffer Overflow), CWE-787 (Out-of-bounds Write), CWE-119 (Buffer Overflow)
Vendor Dlink
Public PoC No

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.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v4.0

Vulnerable Products 40

Configuration From (including) Up to (excluding)
Dlink Dnr-202l_Firmware
cpe:2.3:o:dlink:dnr-202l_firmware:*:*:*:*:*:*:*:*
<= 2026-02-05
Dlink Dnr-202l
cpe:2.3:h:dlink:dnr-202l:-:*:*:*:*:*:*:*
Dlink Dnr-326_Firmware
cpe:2.3:o:dlink:dnr-326_firmware:*:*:*:*:*:*:*:*
<= 2026-02-05
Dlink Dnr-326
cpe:2.3:h:dlink:dnr-326:-:*:*:*:*:*:*:*
Dlink Dns-1100-4_Firmware
cpe:2.3:o:dlink:dns-1100-4_firmware:*:*:*:*:*:*:*:*
<= 2026-02-05
Dlink Dns-1100-4
cpe:2.3:h:dlink:dns-1100-4:-:*:*:*:*:*:*:*
Dlink Dns-120_Firmware
cpe:2.3:o:dlink:dns-120_firmware:*:*:*:*:*:*:*:*
<= 2026-02-05
Dlink Dns-120
cpe:2.3:h:dlink:dns-120:-:*:*:*:*:*:*:*
Dlink Dns-1200-05_Firmware
cpe:2.3:o:dlink:dns-1200-05_firmware:*:*:*:*:*:*:*:*
<= 2026-02-05
Dlink Dns-1200-05
cpe:2.3:h:dlink:dns-1200-05:-:*:*:*:*:*:*:*
Dlink Dns-1550-04_Firmware
cpe:2.3:o:dlink:dns-1550-04_firmware:*:*:*:*:*:*:*:*
<= 2026-02-05
Dlink Dns-1550-04
cpe:2.3:h:dlink:dns-1550-04:-:*:*:*:*:*:*:*
Dlink Dns-315l_Firmware
cpe:2.3:o:dlink:dns-315l_firmware:*:*:*:*:*:*:*:*
<= 2026-02-05
Dlink Dns-315l
cpe:2.3:h:dlink:dns-315l:-:*:*:*:*:*:*:*
Dlink Dns-320_Firmware
cpe:2.3:o:dlink:dns-320_firmware:*:*:*:*:*:*:*:*
<= 2026-02-05
Dlink Dns-320
cpe:2.3:h:dlink:dns-320:-:*:*:*:*:*:*:*
Dlink Dns-320l_Firmware
cpe:2.3:o:dlink:dns-320l_firmware:*:*:*:*:*:*:*:*
<= 2026-02-05
Dlink Dns-320l
cpe:2.3:h:dlink:dns-320l:-:*:*:*:*:*:*:*
Dlink Dns-320lw_Firmware
cpe:2.3:o:dlink:dns-320lw_firmware:*:*:*:*:*:*:*:*
<= 2026-02-05
Dlink Dns-320lw
cpe:2.3:h:dlink:dns-320lw:-:*:*:*:*:*:*:*
Dlink Dns-321_Firmware
cpe:2.3:o:dlink:dns-321_firmware:*:*:*:*:*:*:*:*
<= 2026-02-05
Dlink Dns-321
cpe:2.3:h:dlink:dns-321:-:*:*:*:*:*:*:*
Dlink Dns-322l_Firmware
cpe:2.3:o:dlink:dns-322l_firmware:*:*:*:*:*:*:*:*
<= 2026-02-05
Dlink Dns-322l
cpe:2.3:h:dlink:dns-322l:-:*:*:*:*:*:*:*
Dlink Dns-323_Firmware
cpe:2.3:o:dlink:dns-323_firmware:*:*:*:*:*:*:*:*
<= 2026-02-05
Dlink Dns-323
cpe:2.3:h:dlink:dns-323:-:*:*:*:*:*:*:*
Dlink Dns-325_Firmware
cpe:2.3:o:dlink:dns-325_firmware:*:*:*:*:*:*:*:*
<= 2026-02-05
Dlink Dns-325
cpe:2.3:h:dlink:dns-325:-:*:*:*:*:*:*:*
Dlink Dns-326_Firmware
cpe:2.3:o:dlink:dns-326_firmware:*:*:*:*:*:*:*:*
<= 2026-02-05
Dlink Dns-326
cpe:2.3:h:dlink:dns-326:-:*:*:*:*:*:*:*
Dlink Dns-327l_Firmware
cpe:2.3:o:dlink:dns-327l_firmware:*:*:*:*:*:*:*:*
<= 2026-02-05
Dlink Dns-327l
cpe:2.3:h:dlink:dns-327l:-:*:*:*:*:*:*:*
Dlink Dns-340l_Firmware
cpe:2.3:o:dlink:dns-340l_firmware:*:*:*:*:*:*:*:*
<= 2026-02-05
Dlink Dns-340l
cpe:2.3:h:dlink:dns-340l:-:*:*:*:*:*:*:*
Dlink Dns-343_Firmware
cpe:2.3:o:dlink:dns-343_firmware:*:*:*:*:*:*:*:*
<= 2026-02-05
Dlink Dns-343
cpe:2.3:h:dlink:dns-343:-:*:*:*:*:*:*:*
Dlink Dns-345_Firmware
cpe:2.3:o:dlink:dns-345_firmware:*:*:*:*:*:*:*:*
<= 2026-02-05
Dlink Dns-345
cpe:2.3:h:dlink:dns-345:-:*:*:*:*:*:*:*
Dlink Dns-726-4_Firmware
cpe:2.3:o:dlink:dns-726-4_firmware:*:*:*:*:*:*:*:*
<= 2026-02-05
Dlink Dns-726-4
cpe:2.3:h:dlink:dns-726-4:-:*:*:*:*:*:*:*