CVE-2024-40083Public exploit

Unauthenticated code execution via unbounded sscanf copies

Published Oct 21, 2024 · Updated Jul 5, 2026

Buffer overflow in Vilo Wi-Fi 5 Firmware 5.16.1.33 and earlier allows remote attackers to execute arbitrary code from the router LAN. In local_app_set_router_token, two sscanf calls copy attacker-controlled token and timezone strings into 17-byte stack buffers without length limits. Any unauthenticated LAN user who implements the port 5432 custom XXTEA protocol can corrupt the stack and gain root-level control of the router.

CVSS severity9.6
Critical
EPSS probability0.41%
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 Vilo Wi-Fi 5 Firmware 5.16.1.33 and earlier allows remote attackers to execute arbitrary code from the router LAN. In local_app_set_router_token, two sscanf calls copy attacker-controlled token and timezone strings into 17-byte stack buffers without length limits. Any unauthenticated LAN user who implements the port 5432 custom XXTEA protocol can corrupt the stack and gain root-level control of the router.

The record

CVE
CVE-2024-40083
Published
Oct 21, 2024
Updated
Jul 5, 2026
Vendor
Vilo Living
Product
Vilo Wi-Fi 5 Firmware
Classifications
CWE-120, T1210
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 21, 2024CVE publishedPublication date reported by the CVE source.
  2. Jul 5, 2026Record 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=0 <=5.16.1.33

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Vilo Living · Vilo Wi-Fi 5 Firmwareversion=0 <=5.16.1.33

Published CVSS scores

9.6CISA-ADPCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1210Exploitation of Remote Services

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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