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Rt Ac86U Firmware CVE-2023-38032

HIGH
OS Command Injection (CWE-78)
2023-09-07 twcert@cert.org.tw
8.8
CVSS 3.1 · Vendor: cert
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Vulnerability Assessment

Weakness
CWE
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.

Impact

CVSS score of 8.8 (HIGH). Attack characteristics: network attack vector, low complexity, low 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.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 1.1% exploitation probability (EPSS)

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AnalysisAI

ASUS RT-AC86U AiProtection security- related function has insufficient filtering of special character. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, 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

Find out whether the stacks and servers you run are on an affected version.

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. ASUS RT-AC86U AiProtection security- related function has insufficient filtering of special character. A remote attacker with regular user privilege can exploit this vulnerability to perform command injection attack to execute arbitrary commands, disrupt system or terminate services. Affected products include: Asus Rt-Ac86U Firmware.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (cert) PRIMARY 8.8 HIGH
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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

CVSS VectorVendor: cert

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionCVE.org

ASUS RT-AC86U AiProtection security- related function has insufficient filtering of special character. A remote attacker with regular user privilege can exploit this vulnerability to perform command injection attack to execute arbitrary commands, disrupt system or terminate services.

Threat Intelligence Overview

EPSS Score
1.1%
Top 40% exploitable
Data Quality
2 sources
Confidence: Low

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 HIGH
CISA KEV No
Public POC No
EPSS 1.1%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
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
No
Human Impact· derived
Medium

Priority Score

45
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +44
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

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:asus:rt-ac86u_firmware:3.0.0.4_386_51529:*:*:*:*:*:*:*
CVE-2018-18320 CRITICAL POC
9.8 Oct 15

An issue was discovered in the Merlin.PHP component 0.6.6 for Asuswrt-Merlin devices. Rated critical severity (CVSS 9.8)

CVE-2018-18319 CRITICAL POC
9.8 Oct 15

An issue was discovered in the Merlin.PHP component 0.6.6 for Asuswrt-Merlin devices. Rated critical severity (CVSS 9.8)

CVE-2023-35087 CRITICAL
9.8 Jul 21

It is identified a format string vulnerability in ASUS RT-AX56U V2 & RT-AC86U. Rated critical severity (CVSS 9.8), this

CVE-2018-8826 CRITICAL
9.8 Apr 20

ASUS RT-AC51U, RT-AC58U, RT-AC66U, RT-AC1750, RT-ACRH13, and RT-N12 D1 routers with firmware before 3.0.0.4.380.8228; RT

CVE-2018-9285 CRITICAL
9.8 Apr 04

Main_Analysis_Content.asp in /apply.cgi on ASUS RT-AC66U, RT-AC68U, RT-AC86U, RT-AC88U, RT-AC1900, RT-AC2900, and RT-AC3

CVE-2023-39237 HIGH
8.8 Sep 07

ASUS RT-AC86U Traffic Analyzer - Apps analysis function has insufficient filtering of special character. Rated high seve

CVE-2023-39236 HIGH
8.8 Sep 07

ASUS RT-AC86U Traffic Analyzer - Statistic function has insufficient filtering of special character. Rated high severity

CVE-2023-38033 HIGH
8.8 Sep 07

ASUS RT-AC86U unused Traffic Analyzer legacy Statistic function has insufficient filtering of special character. Rated h

CVE-2023-38031 HIGH
8.8 Sep 07

ASUS RT-AC86U Adaptive QoS - Web History function has insufficient filtering of special character. Rated high severity (

CVE-2023-28702 HIGH
8.8 Jun 02

ASUS RT-AC86U does not filter special characters for parameters in specific web URLs. Rated high severity (CVSS 8.8), th

CVE-2022-25597 HIGH
8.8 Apr 07

ASUS RT-AC86U’s LPD service has insufficient filtering for special characters in the user request, which allows an unaut

CVE-2022-25596 HIGH
8.8 Apr 07

ASUS RT-AC56U’s configuration function has a heap-based buffer overflow vulnerability due to insufficient validation for

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