CVE-2024-7463Public exploitNetwork attack vector

Authenticated device compromise via File buffer overflow

Published Aug 5, 2024 · Updated Aug 5, 2024

Buffer overflow in TOTOLINK CP900 6.3c.566 allows remote authenticated users to cause unspecified impact via a crafted module upload. The UploadCustomModule handler in /cgi-bin/cstecgi.cgi mishandles the File argument, but public sources do not identify the overflowing copy or destination buffer. Access to the authenticated management interface is required; published assessments indicate device-wide confidentiality, integrity, and availability impact, but no specific post-overflow behavior is documented.

CVSS severity9.8
Critical
EPSS probability10.98%
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 CP900 6.3c.566 allows remote authenticated users to cause unspecified impact via a crafted module upload. The UploadCustomModule handler in /cgi-bin/cstecgi.cgi mishandles the File argument, but public sources do not identify the overflowing copy or destination buffer. Access to the authenticated management interface is required; published assessments indicate device-wide confidentiality, integrity, and availability impact, but no specific post-overflow behavior is documented.

The record

CVE
CVE-2024-7463
Published
Aug 5, 2024
Updated
Aug 5, 2024
Vendor
TOTOLINK
Product
CP900
Classifications
CWE-120, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 5, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=6.3c.566

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

TOTOLINK · CP900version=6.3c.566

Published CVSS scores

8.8VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.0VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C
9.8NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.7VulDBCVSS: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

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-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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