CVE-2024-1001Public exploitNetwork attack vector

Remote device compromise via cstecgi.cgi stack overflow

Published Jan 29, 2024 · Updated Jun 16, 2025

Stack-based buffer overflow in TOTOLINK N200RE firmware 9.3.5u.6139_B20201216 allows remote authenticated users to compromise the router. The disclosure locates the overflow in main within /cgi-bin/cstecgi.cgi but does not publish the triggering request field, vulnerable copy operation, or buffer bounds. Administrative access is required under the CNA assessment, and successful memory corruption can expose or alter data and interrupt router service.

CVSS severity7.2
High
EPSS probability1.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in TOTOLINK N200RE firmware 9.3.5u.6139_B20201216 allows remote authenticated users to compromise the router. The disclosure locates the overflow in main within /cgi-bin/cstecgi.cgi but does not publish the triggering request field, vulnerable copy operation, or buffer bounds. Administrative access is required under the CNA assessment, and successful memory corruption can expose or alter data and interrupt router service.

The record

CVE
CVE-2024-1001
Published
Jan 29, 2024
Updated
Jun 16, 2025
Vendor
TOTOLINK
Product
N200RE
Classifications
CWE-121, T1190
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jan 29, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 16, 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=9.3.5u.6139_B20201216

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

TOTOLINK · N200REversion=9.3.5u.6139_B20201216

Published CVSS scores

7.2VulDBCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
8.3VulDBAV:N/AC:L/Au:M/C:C/I:C/A:C
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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1190Exploit Public-Facing Application

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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