CVE-2024-35396Network attack vector

Root access via hardcoded Telnet password

Published May 24, 2024 · Updated Jul 9, 2026

Hard-coded credentials in TOTOLINK CP900 4.1.5cu.798_B20221228 allow remote attackers to gain root access through Telnet. The firmware stores the Telnet password in /web_cste/cgi-bin/product.ini and accepts that shared secret for the root account. Network reachability to the Telnet service and knowledge of the embedded password are sufficient to gain full device privileges.

CVSS severity9.8
Critical
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Hard-coded credentials in TOTOLINK CP900 4.1.5cu.798_B20221228 allow remote attackers to gain root access through Telnet. The firmware stores the Telnet password in /web_cste/cgi-bin/product.ini and accepts that shared secret for the root account. Network reachability to the Telnet service and knowledge of the embedded password are sufficient to gain full device privileges.

The record

CVE
CVE-2024-35396
Published
May 24, 2024
Updated
Jul 9, 2026
Vendor
TOTOLINK
Product
CP900
Classifications
CWE-798, CWE-284, T1078
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 24, 2024CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record 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=v4.1.5cu.798_B20221228

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

TOTOLINK · CP900version=v4.1.5cu.798_B20221228

Published CVSS scores

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

Weakness, pattern, technique

CWE-798Use of Hard-coded Credentials
CWE-284Improper Access Control
T1078Valid Accounts

Public exploit references

No public exploit references are available in this record.

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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