CVE-2023-51034Public exploitNetwork attack vector

Unauthenticated command execution via firmware upload

Published Dec 22, 2023 · Updated Sep 9, 2024

Command execution in TOTOLINK EX1200L Firmware 9.3.5u.6146_b20201023 allows remote attackers to run arbitrary commands via HTTP. The cstecgi.cgi UploadFirmwareFile interface exposes the firmware-upload path so attacker-controlled input reaches command execution. No authentication or user interaction is required in the published CVSS assessment; network access to the extender can therefore affect confidentiality, integrity, and availability.

CVSS severity9.8
Critical
EPSS probability1.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command execution in TOTOLINK EX1200L Firmware 9.3.5u.6146_b20201023 allows remote attackers to run arbitrary commands via HTTP. The cstecgi.cgi UploadFirmwareFile interface exposes the firmware-upload path so attacker-controlled input reaches command execution. No authentication or user interaction is required in the published CVSS assessment; network access to the extender can therefore affect confidentiality, integrity, and availability.

The record

CVE
CVE-2023-51034
Published
Dec 22, 2023
Updated
Sep 9, 2024
Vendor
TOTOLINK
Product
TOTOLINK EX1200L Firmware
Classifications
CWE-434, T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 22, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 9, 2024Record 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=9.3.5u.6146_b20201023

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

TOTOLINK · TOTOLINK EX1200L Firmwareversion=9.3.5u.6146_b20201023

Published CVSS scores

9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.8CISA-ADPCVSS:3.1/AV:A/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-434Unrestricted Upload of File with Dangerous Type
T1059.004Unix Shell

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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