CVE-2023-29803Public exploitNetwork attack vector

Authenticated command execution via unsanitized VPN process ID

Published Apr 14, 2023 · Updated Feb 6, 2025

OS command injection in TOTOLINK X18 firmware 9.1.0cu.2024_B20220329 allows remote authenticated users to execute commands. The disconnectVPN handler appends the unvalidated pid value directly to a kill command and passes the result to CsteSystem for execution. A valid web-interface token obtained after login is required, after which shell separators permit commands to run with the router web process privileges.

CVSS severity9.8
Critical
EPSS probability2.14%
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 X18 firmware 9.1.0cu.2024_B20220329 allows remote authenticated users to execute commands. The disconnectVPN handler appends the unvalidated pid value directly to a kill command and passes the result to CsteSystem for execution. A valid web-interface token obtained after login is required, after which shell separators permit commands to run with the router web process privileges.

The record

CVE
CVE-2023-29803
Published
Apr 14, 2023
Updated
Feb 6, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-77, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 6, 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 privilegesauthenticated

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
9.8CISA-ADPCVSS: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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
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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