CVE-2024-7336Public exploitNetwork attack vector

Authenticated memory corruption via oversized http_host

Published Aug 1, 2024 · Updated Aug 1, 2024

Buffer overflow in TOTOLINK EX200 4.0.3c.7646_B20201211 allows remote authenticated users to corrupt memory via a crafted request. The loginauth function in /cgi-bin/cstecgi.cgi accepts an oversized http_host value without enforcing the destination buffer's bounds. A valid session and network access to the management interface are required; the corruption can interrupt the management service, while reliable code execution is not publicly demonstrated.

CVSS severity8.8
High
EPSS probability1.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in TOTOLINK EX200 4.0.3c.7646_B20201211 allows remote authenticated users to corrupt memory via a crafted request. The loginauth function in /cgi-bin/cstecgi.cgi accepts an oversized http_host value without enforcing the destination buffer's bounds. A valid session and network access to the management interface are required; the corruption can interrupt the management service, while reliable code execution is not publicly demonstrated.

The record

CVE
CVE-2024-7336
Published
Aug 1, 2024
Updated
Aug 1, 2024
Vendor
TOTOLINK
Product
EX200
Classifications
CWE-120, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 1, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 2024Record 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=4.0.3c.7646_B20201211

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

TOTOLINK · EX200version=4.0.3c.7646_B20201211
TOTOLINK · EX200 Firmwareversion=4.0.3c.7646_b20201211

Published CVSS scores

8.8VulDB CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.0VulDB CNAAV:N/AC:L/Au:S/C:C/I:C/A:C
8.7VulDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic 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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