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D-Link DWR-M921 EUVDEUVD-2026-77354

| CVE-2026-90704 LOW
Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') (CWE-74)
2026-09-14 cna@vuldb.com GHSA-qrw7-pm2g-vw5p
Command Injection D-Link
2.0
CVSS 4.0 · Vendor: vuldb

Severity by source

Vendor (vuldb) PRIMARY
2.0 LOW
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/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
vuln.today AI
7.2 HIGH

OS command injection via system() yields full router device control once admin credentials are held; PR:H per CVSS 4.0 input; S:U as no lateral scope change to other systems identified.

3.1 AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (vuldb).

CVSS VectorVendor: vuldb

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
X

Lifecycle Timeline

1
Analysis Generated
Sep 14, 2026 - 10:31 vuln.today

DescriptionCVE.org

A vulnerability was found in D-Link DWR-M921 1.1.52. The impacted element is the function system of the file /boafrm/formDiskPartition. Performing a manipulation of the argument devicename results in command injection. Remote exploitation of the attack is possible. The exploit has been made public and could be used.

AnalysisAI

Command injection in D-Link DWR-M921 firmware 1.1.52 enables authenticated remote attackers to execute arbitrary OS commands by injecting shell metacharacters into the devicename parameter of the /boafrm/formDiskPartition web management endpoint. The firmware passes this parameter unsanitized to a C system() call, granting shell-level access to the device's underlying OS. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation Exploitation requires valid administrator-level credentials to the D-Link DWR-M921 web management interface, as confirmed by the PR:H metric in the CVSS 4.0 vector - an unauthenticated attacker cannot reach the vulnerable handler. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 vector assigns PR:H, confirming that administrative credentials are required before exploitation - this substantially narrows the realistic attacker pool to adversaries who have already compromised or independently obtained admin-level access to the router's web interface. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation No vendor-released patch has been identified at time of analysis for D-Link DWR-M921 firmware version 1.1.52. … Detailed patch versions, workarounds, and compensating controls in full report.
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EUVD-2026-77354 vulnerability details – vuln.today
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