CVE-2023-51011Public exploitNetwork attack vector

Unauthenticated command execution via lanPriDns injection

Published Dec 22, 2023 · Updated Aug 2, 2024

Command injection in TOTOlink EX1800T firmware 9.1.0cu.2112_B20220316 allows remote attackers to execute arbitrary commands via network requests. The setLanConfig handler passes the lanPriDns parameter to cstecgi.cgi without neutralizing command metacharacters, enabling shell command execution. The CVSS record describes unauthenticated network reachability with confidentiality, integrity, and availability impact; no user interaction is required.

CVSS severity9.8
Critical
EPSS probability0.97%
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 firmware 9.1.0cu.2112_B20220316 allows remote attackers to execute arbitrary commands via network requests. The setLanConfig handler passes the lanPriDns parameter to cstecgi.cgi without neutralizing command metacharacters, enabling shell command execution. The CVSS record describes unauthenticated network reachability with confidentiality, integrity, and availability impact; no user interaction is required.

The record

CVE
CVE-2023-51011
Published
Dec 22, 2023
Updated
Aug 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

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

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

9.8NVDCVSS: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.

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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

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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