CVE-2022-43390Network attack vector

Authenticated OS command execution via crafted HTTP request

Published Jan 11, 2023 · Updated Apr 8, 2025

Command injection in the CGI program of Zyxel Networks NR7101 Firmware before 1.15(ACCC.3)C0 allows remote authenticated users to execute OS commands. A crafted HTTP request reaches the CGI program and triggers OS command interpretation; Zyxel has not disclosed the endpoint, parameter, or failed neutralization. Successful exploitation requires valid management credentials and web-interface access; WAN access is disabled by default on most affected devices.

CVSS severity5.4
Medium
EPSS probability1.08%
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 the CGI program of Zyxel Networks NR7101 Firmware before 1.15(ACCC.3)C0 allows remote authenticated users to execute OS commands. A crafted HTTP request reaches the CGI program and triggers OS command interpretation; Zyxel has not disclosed the endpoint, parameter, or failed neutralization. Successful exploitation requires valid management credentials and web-interface access; WAN access is disabled by default on most affected devices.

The record

CVE
CVE-2022-43390
Published
Jan 11, 2023
Updated
Apr 8, 2025
Vendor
Zyxel Networks
Product
NR7101 Firmware
Classifications
CWE-78, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2025Record 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=< V1.15(ACCC.3)C0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Zyxel Networks · NR7101 Firmwareversion=< V1.15(ACCC.3)C0

Published CVSS scores

5.4Zyxel CorporationCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
8.8NIST NVDCVSS: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

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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