Cyber Resilience

CVE-2025-9528

Command Injection in Linksys E1700 Firmware 1.0.0.4.003

Public PoCCommand Injection
Published
27 August 2025
Modified
17 June 2026
Patch / advisory
View advisory
CVSS Score v4 2.0
Click a component to see what it means
Raw vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/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 Score 0.48 99th percentile
Risk Priority 70 floored blend · peak EPSS

Summary

CVE-2025-9528 is a low-severity Command Injection (CWE-77) vulnerability in Linksys E1700 Firmware. Its CVSS base score is 2.0 (Low).

Operationally, exploitation aligns with the MITRE ATT&CK technique Command and Scripting Interpreter (T1059); ranked in the top 1% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SI-10 (Information Input Validation) — see the control section below for these in your framework.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

A vulnerability identified as CVE-2025-9528 exists in the Linksys E1700 router running firmware version 1.0.0.4.003. It resides in the systemCommand function of the /goform/systemCommand endpoint and stems from improper handling of the command argument, enabling OS command injection. The issue is tracked under CWE-77 and CWE-78, carries a CVSS 4.0 score of 2.0, and can be triggered remotely.

An attacker with high privileges can send a crafted request to the affected endpoint and execute arbitrary operating system commands on the device. Successful exploitation yields limited impacts to confidentiality, integrity, and availability on the target system. The exploit code has been publicly released, although the attack requires authenticated administrative access and does not affect other network segments.

The vendor was notified prior to disclosure but provided no response or patch. Public references consist of proof-of-concept material hosted on GitHub and entries in the VulDB database; no official mitigation guidance or firmware update has been issued.

The associated EPSS score remains low and unchanged at 0.0108, indicating limited observed exploitation interest following publication.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability Data

A vulnerability was determined in Linksys E1700 1.0.0.4.003. This vulnerability affects the function systemCommand of the file /goform/systemCommand. Executing manipulation of the argument command can lead to os command injection. The attack may be launched remotely. The exploit has been…

more

publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

CWE(s)
CWE-77CWE-78

Related Threats

MITRE ATT&CK Enterprise Techniques

T1059 Command and Scripting Interpreter Execution
Adversaries may abuse command and script interpreters to execute commands, scripts, or binaries.
attack.mitre.org →
T1059.003 Windows Command Shell Execution
Adversaries may abuse the Windows command shell for execution.
attack.mitre.org →
T1059.004 Unix Shell Execution
Adversaries may abuse Unix shell commands and scripts for execution.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1059.001 PowerShell Execution
Adversaries may abuse PowerShell commands and scripts for execution.
attack.mitre.org →
T1059.008 Network Device CLI Execution
Adversaries may abuse scripting or built-in command line interpreters (CLI) on network devices to execute malicious command and payloads.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2024-22544Same product: Linksys E1700
CVE-2025-5439Same vendor: Linksys
CVE-2025-8825Same vendor: Linksys
CVE-2025-8821Same vendor: Linksys
CVE-2025-5447Same vendor: Linksys
CVE-2025-9244Same vendor: Linksys
CVE-2025-8818Same vendor: Linksys
CVE-2026-4558Same vendor: Linksys
CVE-2025-5442Same vendor: Linksys
CVE-2025-8827Same vendor: Linksys

Affected Assets

linksys
e1700 firmware
1.0.0.4.003

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V1.2.3
  • V1.2.5
  • V1.2.8
  • V1.2.9

Mitigating Controls (NIST 800-53 r5) AI

SA-11 Developer Testing and Evaluation good match

Developer testing and evaluation can discover command-construction flaws before deployment.

SI-10 Information Input Validation good match

Input validation directly stops construction of commands from untrusted data containing special elements.

AC-6 Least Privilege partial match

Least privilege reduces the permissions available to any process that could be subverted by injected commands.

CM-7 Least Functionality partial match

Least functionality restricts available OS commands and interpreters, limiting the blast radius of injection.

SA-8 Security and Privacy Engineering Principles partial match

Secure engineering principles include proper neutralization and safe command construction practices.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly require input validation and neutralization that prevent command injection.

DE.CM-09 partial match
prevents

Runtime monitoring of software and data can detect anomalous command execution resulting from injection.

ID.RA-01 partial match
prevents

Identifying recorded vulnerabilities enables remediation of command-injection flaws before exploitation.

PR.PS-02 partial match
prevents

Routine patching/maintenance can remediate known command-injection CVEs in dependencies (partial forward) but does nothing to stop developers from introducing improper neutralization in custom code (none reverse).

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.28 Secure coding mostly match
prevents

Secure coding standards require proper escaping and parameterization of commands, directly eliminating CWE-77.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing in development catches command-injection vulnerabilities before release.

A.8.25 Secure development life cycle partial match
prevents

Secure development life cycle mandates input validation and command construction practices that directly prevent command injection.

A.8.26 Application security requirements partial match
prevents

Application security requirements explicitly call for controls against injection flaws including command injection.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles reduce the attack surface but do not prescribe the specific neutralization techniques needed.

A.8.31 Separation of development, test and production environments none match
none

Environment separation limits the blast radius of an exploited command injection but does not prevent the flaw itself.

References