Which versions of D-Link are affected by EUVD-2026-17688?

CVE-2026-5214 is a stack-based buffer overflow affecting 21 D-Link NAS device models that allows authenticated users to execute arbitrary code with complete system compromise.

Is there a public PoC exploit available for EUVD-2026-17688?

Yes, a public proof-of-concept exploit is available for EUVD-2026-17688. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate EUVD-2026-17688?

Within 24 hours: Identify all D-Link NAS models in use against the affected product list and isolate devices from untrusted networks or restrict account_mgr.cgi access via firewall rules. Within 7 days: Conduct access log review on affected devices for suspicious authentication patterns and implement network segmentation to limit lateral movement from compromised NAS systems. Within 30 days: Contact D-Link support for patch availability timeline; if no patch emerges, evaluate replacement or permanent air-gapping of affected devices depending on business criticality.

D-Link EUVD-2026-17688

Q: What is the CVSS score of EUVD-2026-17688?

EUVD-2026-17688 has a CVSS 4.0 base score of 7.4 (High). 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. EPSS exploitation probability: 0.0%.

| CVE-2026-5214 HIGH

Stack-based Buffer Overflow (CWE-121)

2026-03-31 VulDB

GHSA-46rv-vf36-7m9j

D-Link Buffer Overflow Stack Overflow

7.4

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

7.4 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Lifecycle Timeline

PoC Detected

Apr 02, 2026 - 17:16 vuln.today

Public exploit code

EUVD ID Assigned

Mar 31, 2026 - 21:31 euvd

EUVD-2026-17688

Analysis Generated

Mar 31, 2026 - 21:31 vuln.today

CVE Published

Mar 31, 2026 - 21:15 nvd

HIGH 7.4

DescriptionCVE.org

A vulnerability was 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. Impacted is the function cgi_addgroup_get_group_quota_minsize of the file /cgi-bin/account_mgr.cgi. The manipulation of the argument Name results in stack-based buffer overflow. The attack may be performed from remote. The exploit has been made public and could be used.

AnalysisAI

Stack-based buffer overflow in D-Link NAS device management interfaces allows authenticated remote attackers to execute arbitrary code with high impact across 21 product models. The vulnerability resides in the cgi_addgroup_get_group_quota_minsize function within /cgi-bin/account_mgr.cgi, exploitable via malicious Name parameter input. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access

Authenticate to D-Link NAS management interface

Delivery

Send crafted HTTP request to /cgi-bin/account_mgr.cgi

Exploit

Overflow Name parameter in cgi_addgroup_get_group_quota_minsize

Execution

Overwrite stack memory

Impact

Execute arbitrary code on device

Access

Authenticate to D-Link NAS management interface

Delivery

Send crafted HTTP request to /cgi-bin/account_mgr.cgi

Exploit

Overflow Name parameter in cgi_addgroup_get_group_quota_minsize

Execution

Overwrite stack memory

Impact

Execute arbitrary code on device

Vulnerability AssessmentAI

Exploitation	Requires: network access (remote), low-privilege authentication. Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	The CVSS base score of 8.8 (High) accurately reflects severe potential impact-complete compromise of confidentiality, integrity, and availability. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An attacker conducts reconnaissance against an organization's perimeter and discovers a D-Link DNS-320L NAS device with its web management interface exposed on port 80/443. Using credential stuffing with common default credentials or previously compromised passwords from corporate breaches, the attacker successfully authenticates to the account management interface. …
Remediation	No vendor-released patch has been independently confirmed from the available data sources. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours: Identify all D-Link NAS models in use against the affected product list and isolate devices from untrusted networks or restrict account_mgr.cgi access via firewall rules. …

Threat intelligence, references, and detailed analysis are available after sign-in.

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EUVD-2026-17688 vulnerability details – vuln.today

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