CVE-2023-51023Public exploitNetwork attack vector

Unauthenticated command execution via host_time injection

Published Dec 22, 2023 · Updated Aug 2, 2024

OS command injection in TOTOlink EX1800T firmware 9.1.0cu.2112_B20220316 allows remote attackers to execute arbitrary commands. The NTPSyncWithHost interface in cstecgi.cgi uses the untrusted host_time parameter in command execution, permitting injected shell syntax to alter the command. Network access to the CGI endpoint is sufficient; successful exploitation can read or modify data and interrupt router operations.

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

OS command injection in TOTOlink EX1800T firmware 9.1.0cu.2112_B20220316 allows remote attackers to execute arbitrary commands. The NTPSyncWithHost interface in cstecgi.cgi uses the untrusted host_time parameter in command execution, permitting injected shell syntax to alter the command. Network access to the CGI endpoint is sufficient; successful exploitation can read or modify data and interrupt router operations.

The record

CVE
CVE-2023-51023
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

9.8NIST 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.

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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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