CVE-2026-41926

Published May 4, 2026

Last updated 20 days ago

CVSS critical 9.3
Wlan

Overview

Description
WDR201A WiFi Extender (HW V2.1, FW LFMZX28040922V1.02) contains an OS command injection vulnerability in the firewall.cgi binary across five request handlers that apply insufficient input validation. Attackers can inject arbitrary shell commands through vulnerable parameters like websURLFilter, websHostFilter, portForward, singlePortForward, and ipportFilter using subshell syntax or unfiltered parameters, with payloads persisting in NVRAM and re-executing on every subsequent firewall.cgi request.
Source
disclosure@vulncheck.com
NVD status
Deferred

Risk scores

CVSS 4.0

Type
Secondary
Base score
9.3
Impact score
-
Exploitability score
-
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/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
Severity
CRITICAL

Weaknesses

disclosure@vulncheck.com
CWE-78

Social media

Hype score
Not currently trending

Related CVEs

  1. Transient DOS when processing target power rate tables during channel configuration.•CVE-2025-47401
  2. Transient DOS when processing a malformed Fast Transition response frame with an invalid header structure during wireless roaming.•CVE-2025-47403
  3. In wlan STA driver, there is a possible escalation of privilege due to a missing bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: WCNCR00473802; Issue ID: MSV-5970.•CVE-2026-20436
  4. In wlan STA driver, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00465314; Issue ID: MSV-4956.•CVE-2026-20423
  5. A vulnerability was found in D-Link DWR-M960 1.01.07. This issue affects the function sub_452CCC of the file /boafrm/formWlEncrypt of the component WLAN Encryption Configuration Endpoint. The manipulation of the argument submit-url results in stack-based buffer overflow. The attack may be launched remotely. The exploit has been made public and could be used.•CVE-2026-2928

References

Sources include official advisories and independent security research.