CVE-2024-0998Public exploitNetwork attack vector

Authenticated memory corruption via unbounded diagnosis IP field

Published Jan 29, 2024 · Updated May 29, 2025

Stack-based buffer overflow in TOTOLINK N200RE 9.3.5u.6139_B20201216 allows remote authenticated users to corrupt router memory via its web interface. The setDiagnosisCfg handler in /cgi-bin/cstecgi.cgi fails to bound the ip field before it overruns stack storage. Access to the management endpoint is required; successful exploitation can crash the CGI process or alter control flow on the router.

CVSS severity8.8
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 9.3.5u.6139_B20201216 allows remote authenticated users to corrupt router memory via its web interface. The setDiagnosisCfg handler in /cgi-bin/cstecgi.cgi fails to bound the ip field before it overruns stack storage. Access to the management endpoint is required; successful exploitation can crash the CGI process or alter control flow on the router.

The record

CVE
CVE-2024-0998
Published
Jan 29, 2024
Updated
May 29, 2025
Vendor
TOTOLINK
Product
N200RE
Classifications
CWE-121
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 29, 2024CVE publishedPublication date reported by the CVE source.
  2. May 29, 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 privilegesauthenticated

What is affected?

TOTOLINK · N200REversion=9.3.5u.6139_B20201216

Published CVSS scores

8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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

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-121Stack-based Buffer Overflow

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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