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CVE-2026-90702— D-Link DWR-M921 formDiskFormat system os command injection

Quick assessment

Affected
D-Link DWR-M921
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 D-Link DWR-M921（版本 1.1.52）中发现了一个缺陷。受影响的模块是 文件中的 system 函数。对参数 的操作可导致操作系统命令注入。该攻击可远程发起。利用方法已公开，可能被利用。

CVSS 9.1 · Critical

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2026-90702

Vulnerability Information
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Vulnerability Title
D-Link DWR-M921 formDiskFormat system os command injection
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw has been found in D-Link DWR-M921 1.1.52. Impacted is the function system of the file /boafrm/formDiskFormat. This manipulation of the argument partition causes os command injection. The attack may be initiated remotely. The exploit has been published and may be used.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
D-Link DWR-M921 1.1.52 cpe:2.3:h:d-link:dwr-m921:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-90702

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III. Intelligence Information for CVE-2026-90702

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Proof of Concept for CVE-2026-90702 (1)

Vendor Pages for CVE-2026-90702 (1)

Same Patch Batch · D-Link · 2026-09-14 · 9 CVEs total

CVE-2026-90699 9.9 CRITICAL D-Link DWR-M920 formPinManageSetup sub_41E60C os command injection
CVE-2026-90693 9.9 CRITICAL D-Link DIR-878 WAN Settings SetWan3Settings stack-based overflow
CVE-2026-90692 9.9 CRITICAL D-Link DIR-878 Dynamic DNS IPv6 Settings SetDynamicDNSIPv6Settings stack-based overflow
CVE-2026-90680 9.9 CRITICAL D-Link DIR-823G HNAP1 SetStaticRouteSettings strcpy stack-based overflow
CVE-2026-90703 9.1 CRITICAL D-Link DWR-M921 formDiskCreateShare system os command injection
CVE-2026-90706 6.6 MEDIUM D-Link DWR-M921 formWsc os command injection
CVE-2026-90705 6.6 MEDIUM D-Link DWR-M921 Boa Dispatch Table formsysCmd os command injection
CVE-2026-90704 6.6 MEDIUM D-Link DWR-M921 formDiskPartition system command injection

IV. Related Vulnerabilities

Same product: DWR-M921
Same vendor: D-Link
Same weakness: CWE-78

V. Comments for CVE-2026-90702

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