CVE-2023-37146Public exploitNetwork attack vector

Unauthenticated command execution via firmware filename injection

Published Jul 7, 2023 · Updated Nov 12, 2024

Command injection in TOTOLINK LR350 9.3.5u.6369_B20220309 allows remote attackers to execute arbitrary commands through a firmware-upload request. The UploadFirmwareFile handler passes the untrusted FileName value directly to dosystem, which ultimately invokes the system shell without neutralizing command delimiters. The management interface must be network-reachable; no authentication or user interaction is required, and successful injection executes commands on the router operating system.

CVSS severity9.8
Critical
EPSS probability1.96%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in TOTOLINK LR350 9.3.5u.6369_B20220309 allows remote attackers to execute arbitrary commands through a firmware-upload request. The UploadFirmwareFile handler passes the untrusted FileName value directly to dosystem, which ultimately invokes the system shell without neutralizing command delimiters. The management interface must be network-reachable; no authentication or user interaction is required, and successful injection executes commands on the router operating system.

The record

CVE
CVE-2023-37146
Published
Jul 7, 2023
Updated
Nov 12, 2024
Vendor
TOTOLINK
Product
LR350
Classifications
CWE-77, T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 12, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=V9.3.5u.6369_B20220309

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

TOTOLINK · LR350version=V9.3.5u.6369_B20220309

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059.004Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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