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CVE-2026-5211

D-Link DNS-1550-04 app_mgr.cgi UPnP_AV_Server_Path_Del stack-based overflow

Published: Mar 31, 2026Updated: Apr 2, 2026 Sources: CVE List NVDCWE-119
NVD MITRE
8.8CVSSHIGH
EPSS Score
0.7%
Top 51.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

Description

A flaw 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 vulnerability affects the function UPnP_AV_Server_Path_Del of the file /cgi-bin/app_mgr.cgi. Executing a manipulation of the argument f_dir can lead to stack-based buffer overflow. The attack can be executed remotely. The exploit has been published and may be used.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-119CWE-121CWE-787

Affected Products

DNS-120D-LinkNetworking Infrastructure
DNR-202LD-LinkNetworking Infrastructure
DNS-315LD-LinkNetworking Infrastructure
DNS-320D-LinkNetworking Infrastructure
DNS-320LD-LinkNetworking Infrastructure
d-linkcommercialTWNetworking Infrastructure
and 35 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://vuldb.com/vuln/354347
vuldb.com
https://vuldb.com/vuln/354347/cti
vuldb.com
https://vuldb.com/submit/780434
vuldb.com
and 2 more references View all →

Timeline

Published
Mar 31, 2026
Last Updated
Apr 2, 2026

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