CVE-2023-52026Public exploitNetwork attack vector

Unauthenticated command execution via telnet_enabled injection

Published Jan 12, 2024 · Updated Jun 11, 2025

OS command injection in the setTelnetCfg interface of TOTOLINK EX1800T 9.1.0cu.2112_B20220316 allows remote attackers to execute commands. The handler incorporates the telnet_enabled parameter into an operating-system command without neutralizing shell metacharacters. No authentication or user interaction is required, and successful exploitation grants control over the appliance with confidentiality, integrity, and availability impact.

CVSS severity9.8
Critical
EPSS probability1.64%
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 the setTelnetCfg interface of TOTOLINK EX1800T 9.1.0cu.2112_B20220316 allows remote attackers to execute commands. The handler incorporates the telnet_enabled parameter into an operating-system command without neutralizing shell metacharacters. No authentication or user interaction is required, and successful exploitation grants control over the appliance with confidentiality, integrity, and availability impact.

The record

CVE
CVE-2023-52026
Published
Jan 12, 2024
Updated
Jun 11, 2025
Vendor
TOTOLINK
Product
EX1800T
Classifications
CWE-78, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 12, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 11, 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=V9.1.0cu.2112_B20220316

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

TOTOLINK · EX1800Tversion=V9.1.0cu.2112_B20220316

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NVDCVSS: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-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

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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