CVE-2023-51018Public exploitNetwork attack vector

Unauthenticated command execution via opmode injection

Published Dec 22, 2023 · Updated Apr 17, 2025

Command injection in TOTOlink EX1800T 9.1.0cu.2112_B20220316 allows remote attackers to execute arbitrary commands via its CGI interface. The setWiFiApConfig handler in cstecgi.cgi incorporates the opmode parameter into a constructed command without filtering shell metacharacters. No authentication or user interaction is required, and successful requests execute attacker-supplied commands with the CGI process's privileges.

CVSS severity9.8
Critical
EPSS probability1.05%
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 TOTOlink EX1800T 9.1.0cu.2112_B20220316 allows remote attackers to execute arbitrary commands via its CGI interface. The setWiFiApConfig handler in cstecgi.cgi incorporates the opmode parameter into a constructed command without filtering shell metacharacters. No authentication or user interaction is required, and successful requests execute attacker-supplied commands with the CGI process's privileges.

The record

CVE
CVE-2023-51018
Published
Dec 22, 2023
Updated
Apr 17, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-94, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 22, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 17, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1190Exploit Public-Facing Application

Public exploit references

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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