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T8 FirmwareOperating system · Totolink

CVE-2024-0944

MEDIUM · 5.3 CVSS v3.1 Published 2024-01-26
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
62/100
Remediation priority · Elevated
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
A vulnerability was found in Totolink T8 4.1.5cu.833_20220905. It has been rated as problematic. Affected by this issue is some unknown functionality of the file /cgi-bin/cstecgi.cgi. The manipulation leads to session expiration. The attack may be launched remotely. The complexity of an attack is rather high. The exploitation is known to be difficult. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-252188. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

A session management vulnerability exists in Totolink T8 router firmware 4.1.5cu.833_20220905 in the /cgi-bin/cstecgi.cgi binary. The issue allows manipulation of session expiration, likely enabling attackers to prematurely terminate legitimate user sessions or cause denial of service through session disruption. Exploitation requires high complexity and specific knowledge.

MitigationSince the vendor did not respond to disclosure, apply network segmentation to isolate the router from untrusted networks, disable remote WAN management if enabled, and monitor for unauthorized access attempts. Consider replacing the device if no firmware update becomes available.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
T8 FirmwareOperating system
Affected:= 4.1.5cu.833_20220905

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Check router firmware version
    Access the router admin panel or use command line tools (like curl or nmap) to query the device's web interface or SNMP for the firmware version. Look for the build date 20220905 or version string 4.1.5cu.833.
    Affected if The firmware version displayed is exactly 4.1.5cu.833_20220905.
  2. Verify the vulnerable CGI binary exists
    If you have shell access or can extract the firmware, check for the existence of /cgi-bin/cstecgi.cgi in the web root directory of the device.
    Affected if The file /cgi-bin/cstecgi.cgi exists on the device and corresponds to the firmware in step 1.
  3. Confirm remote WAN management is enabled
    Log into the router admin panel and navigate to the management settings. Check if 'Remote Management', 'WAN Access', or similar options are enabled for external IP addresses.
    Affected if Remote WAN management is enabled, allowing potential attackers from the internet to reach the vulnerable CGI binary.
  4. Review session management behavior
    Log into the router multiple times and observe session behavior. Look for unexpected session timeouts, premature disconnections, or irregularities in session expiration timing when using the web interface.
    Affected if Sessions terminate unexpectedly or exhibit abnormal expiration patterns after normal router use.

You are affected if your Totolink T8 router runs firmware version 4.1.5cu.833_20220905 and the /cgi-bin/cstecgi.cgi binary is present and accessible.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Since the vendor did not respond to disclosure, apply network segmentation to isolate the router from untrusted networks, disable remote WAN management if enabled, and monitor for unauthorized access attempts. Consider replacing the device if no firmware update becomes available.

Fix this in T8 Firmware Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA2.0 h
20.0 hours of engineering $3,500
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2024-0944 in production — separate from our analysis above.

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What this is

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What belongs here
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