CVE-2023-22919Network attack vector

Authenticated OS command execution via crafted HTTP request

Published May 1, 2023 · Updated Jan 30, 2025

OS command injection in Zyxel NBG6604 firmware V1.01(ABIR.0)C0 allows remote authenticated users to execute OS commands via HTTP. Zyxel has not disclosed the affected HTTP handler, parameter, or command-construction operation beyond its processing of a crafted request. Exploitation requires authenticated access to the web management interface; WAN access is disabled by default, limiting default exposure to the local network.

CVSS severity8.8
High
EPSS probability1.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Zyxel NBG6604 firmware V1.01(ABIR.0)C0 allows remote authenticated users to execute OS commands via HTTP. Zyxel has not disclosed the affected HTTP handler, parameter, or command-construction operation beyond its processing of a crafted request. Exploitation requires authenticated access to the web management interface; WAN access is disabled by default, limiting default exposure to the local network.

The record

CVE
CVE-2023-22919
Published
May 1, 2023
Updated
Jan 30, 2025
Vendor
Zyxel Networks
Product
NBG6604 firmware
Classifications
CWE-78, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 30, 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=V1.01(ABIR.0)C0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Zyxel Networks · NBG6604 firmwareversion=V1.01(ABIR.0)C0

Published CVSS scores

8.8Zyxel CorporationCVSS: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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