CVE-2024-36650Public exploitNetwork attack vector

Unauthenticated service crash via unchecked NoticeUrl length

Published Jun 11, 2024 · Updated Aug 2, 2024

Stack buffer overflow in TOTOLINK A3100R 4.1.2cu.5247_B20211129 allows remote attackers to crash the router via HTTP or MQTT requests. The setNoticeCfg CGI function in /lib/cste_modules/system.so copies the NoticeUrl string without checking its length, overflowing a stack buffer. No authentication or user interaction is required; a crafted request can interrupt routing service by crashing the device, with no demonstrated confidentiality or integrity impact.

CVSS severity7.5
High
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack buffer overflow in TOTOLINK A3100R 4.1.2cu.5247_B20211129 allows remote attackers to crash the router via HTTP or MQTT requests. The setNoticeCfg CGI function in /lib/cste_modules/system.so copies the NoticeUrl string without checking its length, overflowing a stack buffer. No authentication or user interaction is required; a crafted request can interrupt routing service by crashing the device, with no demonstrated confidentiality or integrity impact.

The record

CVE
CVE-2024-36650
Published
Jun 11, 2024
Updated
Aug 2, 2024
Vendor
TOTOLINK
Product
A3100R
Classifications
CWE-120, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 11, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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=v4.1.2cu.5247_b20211129

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

TOTOLINK · A3100Rversion=v4.1.2cu.5247_b20211129

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 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 exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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