Cyber Resilience

CVE-2023-37146

RCE in Totolink Lr350 Firmware 9.3.5u.6369_b20220309

Public PoCRCECommand Injection
Published
07 July 2023
Modified
21 November 2024
CVSS Score v3.1 9.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.020 78th percentile
Risk Priority 86 floored blend · peak EPSS

Summary

CVE-2023-37146 is a critical-severity Command Injection (CWE-77) vulnerability in Totolink Lr350 Firmware. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Command and Scripting Interpreter (T1059); ranked in the top 22% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

Deeper analysis AI-assisted summary

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

TOTOLINK LR350 firmware version V9.3.5u.6369_B20220309 contains a command injection vulnerability in the UploadFirmwareFile function, where the FileName parameter is processed without adequate sanitization. The flaw is classified under CWE-77 and carries a CVSS 3.1 score of 9.8, reflecting network-accessible exploitation with no required credentials or user interaction and full impact on confidentiality, integrity, and availability.

An unauthenticated attacker with network access can supply a crafted FileName value during firmware upload to inject and execute arbitrary operating-system commands on the device. Successful exploitation grants the attacker complete control over the router, enabling actions such as configuration changes, traffic interception, or persistence mechanisms.

Public references consist of GitHub repositories that document the vulnerability details and proof-of-concept inputs, but they contain no vendor advisory, firmware patch, or official mitigation guidance.

The EPSS score rose from a low baseline to a peak of 0.2744 on 2025-01-22 before receding to the current value of 0.0140, indicating a period of increased exploitation interest that emerged well after the 2023 disclosure.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability Data

TOTOLINK LR350 V9.3.5u.6369_B20220309 was discovered to contain a command injection vulnerability via the FileName parameter in the UploadFirmwareFile function.

CWE(s)
CWE-77

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 →
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 →
T1059.003 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 →
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-2023-37149Same product: Totolink Lr350
CVE-2023-37148Same product: Totolink Lr350
CVE-2023-37145Same product: Totolink Lr350
CVE-2024-7214Same product: Totolink Lr350
CVE-2024-36783Same product: Totolink Lr350
CVE-2026-1150Same product: Totolink Lr350
CVE-2026-1149Same product: Totolink Lr350
CVE-2025-63465Same product: Totolink Lr350
CVE-2025-63463Same product: Totolink Lr350
CVE-2025-63467Same product: Totolink Lr350

Affected Assets

totolink
lr350 firmware
9.3.5u.6369_b20220309

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 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.

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