CVE-2024-53335Public exploit

Code execution or crash via unchecked query copy

Published Nov 21, 2024 · Updated Nov 26, 2024

Buffer overflow in downloadFlile.cgi in TOTOLINK A810R 4.1.2cu.5182_B20201026 allows local users to execute code or crash the router. The CGI copies the complete QUERY_STRING into the v24 stack buffer with sprintf without checking its length. The published proof of concept requires a valid session cookie and sends an 8,000-byte HTTP query, exposing authenticated management sessions to code execution or service interruption.

CVSS severity7.8
High
EPSS probability0.25%
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 downloadFlile.cgi in TOTOLINK A810R 4.1.2cu.5182_B20201026 allows local users to execute code or crash the router. The CGI copies the complete QUERY_STRING into the v24 stack buffer with sprintf without checking its length. The published proof of concept requires a valid session cookie and sends an 8,000-byte HTTP query, exposing authenticated management sessions to code execution or service interruption.

The record

CVE
CVE-2024-53335
Published
Nov 21, 2024
Updated
Nov 26, 2024
Vendor
TOTOLINK
Product
A810R
Classifications
CWE-120, T1190
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 21, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 26, 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=4.1.2cu.5182_b20201026

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

TOTOLINK · A810Rversion=4.1.2cu.5182_b20201026

Published CVSS scores

7.8CISA-ADPCVSS:3.1/AV:L/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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
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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