High severity · published Mar 31, 2026
CVE-2026-5212
D-Link DNS-1550-04 webdav_mgr.cgi Webdav_Upload_File stack-based overflow
8.8
CVSS
0.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 54% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DN
DNR-202L · D-Link
20260205 · source: vendor
DN
DNR-322L · D-Link
20260205 · source: vendor
DN
DNR-326 · D-Link
20260205 · source: vendor
DN
DNS-1100-4 · D-Link
20260205 · source: vendor
DN
DNS-120 · D-Link
20260205 · source: vendor
DN
DNS-1200-05 · D-Link
20260205 · source: vendor
DN
DNS-1550-04 · D-Link
20260205 · source: vendor
DN
DNS-315L · D-Link
20260205 · source: vendor
DN
DNS-320 · D-Link
20260205 · source: vendor
DN
DNS-320L · D-Link
20260205 · source: vendor
DN
DNS-320LW · D-Link
20260205 · source: vendor
DN
DNS-321 · D-Link
20260205 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-5212
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-5212
Exploit
https://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_166/166.md
Third Party Advisory
https://vuldb.com/submit/780435
Third Party Advisory
https://vuldb.com/submit/780436
Third Party Advisory
https://vuldb.com/vuln/354348
Permissions Required
https://vuldb.com/vuln/354348/cti
Product
https://www.dlink.com/
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