What is the CVSS score of CVE-2024-7261?

CVE-2024-7261 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 11.3%.

Nwa1123Acv3 Firmware CVE-2024-7261

CRITICAL

OS Command Injection (CWE-78)

2024-09-03 security@zyxel.com.tw

Command Injection Zyxel Nwa50Ax Firmware Nwa50Ax Pro Firmware Nwa55Axe Firmware Nwa90Ax Firmware Nwa90Ax Pro Firmware Nwa110Ax Firmware Nwa130Be Firmware Nwa210Ax Firmware Nwa220Ax 6E Firmware Nwa1123Acv3 Firmware Wac500 Firmware Wac500H Firmware Wax300H Firmware Wax510D Firmware Wax610D Firmware Wax620D 6E Firmware Wax630S Firmware Wax640S 6E Firmware Wax650S Firmware Wax655E Firmware Wbe530 Firmware Wbe660S Firmware Usg Lite 60Ax Firmware Nwa1123 Ac Pro Firmware Wac6103D I Firmware Wac6502D S Firmware Wac6503D S Firmware Wac6552D S Firmware Wac6553D E Firmware

9.8

CVSS 3.1 · Vendor: zyxel

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Vulnerability Assessment

Weakness	CWE CWE-78 OWASP Top 10:2025 A05:2025 - Injection ASVS 5.0 V1 - Encoding and Sanitization OS command sanitization, avoid shell exec MITRE ATT&CK 2 techniques across 1 tactic: Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required.
Exploit ScenarioDerived	A remote attacker could execute arbitrary operating system commands on the host by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.

No patch listed yet 11.3% exploitation probability (EPSS)

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AnalysisAI

The improper neutralization of special elements in the parameter "host" in the CGI program of Zyxel NWA1123ACv3 firmware version 6.70(ABVT.4) and earlier, WAC500 firmware version 6.70(ABVS.4) and. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Avoid passing user input to shell commands. Use language-specific APIs instead of shell execution. Apply strict input validation with allowlists.

Affects your stack

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Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as OS Command Injection (CWE-78), which allows attackers to execute arbitrary operating system commands on the host. The improper neutralization of special elements in the parameter "host" in the CGI program of Zyxel NWA1123ACv3 firmware version 6.70(ABVT.4) and earlier, WAC500 firmware version 6.70(ABVS.4) and earlier, WAX655E firmware version 7.00(ACDO.1) and earlier, WBE530 firmware version 7.00(ACLE.1) and earlier, and USG LITE 60AX firmware version V2.00(ACIP.2) could allow an unauthenticated attacker to execute OS commands by sending a crafted cookie to a vulnerable device. Affected products include: Zyxel Nwa110Ax Firmware, Zyxel Nwa1123-Ac Pro Firmware, Zyxel Nwa1123Acv3 Firmware, Zyxel Nwa130Be Firmware, Zyxel Nwa210Ax Firmware. Version information: version 6.70.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (zyxel) PRIMARY 9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from Vendor (zyxel) · only source for this CVE.

CVSS VectorVendor: zyxel

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

DescriptionCVE.org

The improper neutralization of special elements in the parameter "host" in the CGI program of Zyxel NWA1123ACv3 firmware version 6.70(ABVT.4) and earlier, WAC500 firmware version 6.70(ABVS.4)

and earlier, WAX655E firmware version 7.00(ACDO.1) and earlier, WBE530 firmware version 7.00(ACLE.1)

and earlier, and USG LITE 60AX firmware version V2.00(ACIP.2) could allow an unauthenticated attacker to execute OS commands by sending a crafted cookie to a vulnerable device.

Threat Intelligence Overview

EPSS Score

11.3%

Top 5% exploitable

Data Quality

2 sources

Confidence: Low

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity CRITICAL

CISA KEV No

Public POC No

EPSS 11.3%

Patch available No

Active threat No

Deciding rule

CRITICAL severity

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +11

CVSS: +49

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

OS Command Injection CRITICAL

OS command injection occurs when an application passes unsanitized user input directly into system shell commands.

Affected Products (CPE)CVE.org

cpe:2.3:o:zyxel:nwa110ax_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:zyxel:nwa1123-ac_pro_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:zyxel:nwa1123acv3_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:zyxel:nwa130be_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:zyxel:nwa210ax_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:zyxel:nwa220ax-6e_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:zyxel:nwa50ax_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:zyxel:nwa50ax_pro_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:zyxel:nwa55axe_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:zyxel:nwa90ax_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:zyxel:nwa90ax_pro_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:zyxel:usg_lite_60ax_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:zyxel:wac500_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:zyxel:wac500h_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:zyxel:wac6103d-i_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:zyxel:wac6502d-s_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:zyxel:wac6503d-s_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:zyxel:wac6552d-s_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:zyxel:wac6553d-e_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:zyxel:wax300h_firmware:*:*:*:*:*:*:*:*

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References

Advisories & patches

ADVISORY https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-os-command-injection-vulnerability-in-aps-and-security-router-devices-09-03-2024

Search Externally

GitHub PoC

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