CVE-2024-28640Network attack vector

Unauthenticated service interruption via crafted command field

Published Mar 16, 2024 · Updated Oct 28, 2024

Buffer overflow in TOTOLINK X5000R and A7000R firmware allows remote attackers to interrupt affected routers through a crafted command field. The now-unavailable disclosure leaves the affected handler, memory operation, and interruption mode publicly undocumented. The confirmed builds are X5000R 9.1.0u.6118-B20201102 and A7000R 9.1.0u.6115-B20201022; no authentication or user interaction is required.

CVSS severity7.5
High
EPSS probability14.18%
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 X5000R and A7000R firmware allows remote attackers to interrupt affected routers through a crafted command field. The now-unavailable disclosure leaves the affected handler, memory operation, and interruption mode publicly undocumented. The confirmed builds are X5000R 9.1.0u.6118-B20201102 and A7000R 9.1.0u.6115-B20201022; no authentication or user interaction is required.

The record

CVE
CVE-2024-28640
Published
Mar 16, 2024
Updated
Oct 28, 2024
Vendor
TOTOLINK
Product
A7000R Firmware
Classifications
CWE-125, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 16, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 28, 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=9.1.0u.6115_b20201022

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

TOTOLINK · A7000R Firmwareversion=9.1.0u.6115_b20201022
TOTOLINK · TOTOLINK X5000R Firmwareversion=9.1.0u.6118_b20201102

Published CVSS scores

7.5CISA-ADPCVSS: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.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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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