CVE-2023-43890Public exploitNetwork attack vector

Authenticated command injection via diagnostic tools

Published Oct 2, 2023 · Updated Sep 20, 2024

Command injection in Netis N3 Firmware 1.0.1.865 allows remote authenticated users to execute OS commands via crafted HTTP requests. The diagnostic ping and traceroute handler rejects spaces, pipes, semicolons, and ampersands but passes backticks and dollar signs into a system() command, enabling shell command injection. Authentication to the router management interface is required, and successful exploitation can provide root-level command execution with confidentiality, integrity, and availability impact.

CVSS severity8.8
High
EPSS probability2.52%
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 Netis N3 Firmware 1.0.1.865 allows remote authenticated users to execute OS commands via crafted HTTP requests. The diagnostic ping and traceroute handler rejects spaces, pipes, semicolons, and ampersands but passes backticks and dollar signs into a system() command, enabling shell command injection. Authentication to the router management interface is required, and successful exploitation can provide root-level command execution with confidentiality, integrity, and availability impact.

The record

CVE
CVE-2023-43890
Published
Oct 2, 2023
Updated
Sep 20, 2024
Vendor
Netis Systems Co., Ltd.
Product
N3 Firmware
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 2, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 20, 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=1.0.1.865

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Netis Systems Co., Ltd. · N3 Firmwareversion=1.0.1.865

Published CVSS scores

8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Command and Scripting Interpreter: Unix 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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