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Ex1800T Firmware CVE-2023-51028

CRITICAL
OS Command Injection (CWE-78)
2023-12-22 cve@mitre.org
Command Injection Ex1800T Firmware TOTOLINK
9.8
CVSS 3.1 · NVD
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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.

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Impact

CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. Public proof-of-concept exploit code is available.
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 + public POC available.
No patch listed yet 1.0% exploitation probability (EPSS)

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AnalysisAI

TOTOLINK EX1800T 9.1.0cu.2112_B20220316 is vulnerable to unauthorized arbitrary command execution in the apcliChannel parameter of the setWiFiExtenderConfig interface of the cstecgi.cgi. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and 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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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. TOTOLINK EX1800T 9.1.0cu.2112_B20220316 is vulnerable to unauthorized arbitrary command execution in the apcliChannel parameter of the setWiFiExtenderConfig interface of the cstecgi.cgi. Affected products include: Totolink Ex1800T Firmware.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

NVD PRIMARY 9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

DescriptionNVD

TOTOLINK EX1800T 9.1.0cu.2112_B20220316 is vulnerable to unauthorized arbitrary command execution in the apcliChannel parameter of the setWiFiExtenderConfig interface of the cstecgi.cgi.

Threat Intelligence Overview

EPSS Score
1.0%
Top 40% exploitable
Exploit
POC
Public exploit code exists
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 Yes
EPSS 1.0%
Patch available No
Active threat No
Deciding rule
CRITICAL severity + public POC available
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
Poc
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

70
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +49
PoC: +20
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)NVD

cpe:2.3:o:totolink:ex1800t_firmware:9.1.0cu.2112_b20220316:*:*:*:*:*:*:*

More in Ex1800T Firmware

View all
CVE-2023-52026 CRITICAL POC
9.8 Jan 12

TOTOlink EX1800T V9.1.0cu.2112_B20220316 was discovered to contain a remote command execution (RCE) vulnerability via th
CVE-2024-34257 CRITICAL POC
9.8 May 08

TOTOLINK EX1800T V9.1.0cu.2112_B20220316 has a vulnerability in the apcliEncrypType parameter that allows unauthorized e
CVE-2023-51022 CRITICAL POC
9.8 Dec 22

TOTOlink EX1800T v9.1.0cu.2112_B20220316 is vulnerable to unauthorized arbitrary command execution in the ‘langFlag’ par
CVE-2023-51021 CRITICAL POC
9.8 Dec 22

TOTOlink EX1800T v9.1.0cu.2112_B20220316 is vulnerable to unauthorized arbitrary command execution in the ‘merge’ parame
CVE-2023-51020 CRITICAL POC
9.8 Dec 22

TOTOlink EX1800T v9.1.0cu.2112_B20220316 is vulnerable to unauthorized arbitrary command execution in the ‘langType’ par
CVE-2023-51019 CRITICAL POC
9.8 Dec 22

TOTOlink EX1800T v9.1.0cu.2112_B20220316 is vulnerable to unauthorized arbitrary command execution in the ‘key5g’ parame
CVE-2023-51018 CRITICAL POC
9.8 Dec 22

TOTOlink EX1800T v9.1.0cu.2112_B20220316 is vulnerable to unauthorized arbitrary command execution in the ‘opmode’ param
CVE-2023-51017 CRITICAL POC
9.8 Dec 22

TOTOlink EX1800T v9.1.0cu.2112_B20220316 is vulnerable to unauthorized arbitrary command execution in the lanIp paramete
CVE-2023-51016 CRITICAL POC
9.8 Dec 22

TOTOlink EX1800T v9.1.0cu.2112_B20220316 is vulnerable to unauthorized arbitrary command execution in the setRebootScheC
CVE-2023-51015 CRITICAL POC
9.8 Dec 22

TOTOLINX EX1800T v9.1.0cu.2112_B20220316 is vulnerable to arbitrary command execution in the ‘enable parameter’ of the s
CVE-2023-51014 CRITICAL POC
9.8 Dec 22

TOTOLINK EX1800T V9.1.0cu.2112_B20220316 is vulnerable to unauthorized arbitrary command execution in the lanSecDns para
CVE-2023-51013 CRITICAL POC
9.8 Dec 22

TOTOlink EX1800T v9.1.0cu.2112_B20220316 is vulnerable to unauthorized arbitrary command execution in the lanNetmask par

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