CVE-2024-51500Network attack vector

Mesh bandwidth exhaustion via forged broadcast-source packets

Published Nov 4, 2024 · Updated Nov 5, 2024

Denial of service in Meshtastic Firmware before 2.5.6 allows remote attackers to degrade mesh performance with a forged broadcast-source packet. On receiving a previously unseen sender, a node requests its information without rejecting the reserved 0xFFFFFFFF broadcast address, causing the reply itself to be broadcast. Any attacker able to inject a mesh packet can trigger multiple transmissions from every receiving node, consuming shared radio bandwidth without authentication or user interaction.

CVSS severity5.3
Medium
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Denial of service in Meshtastic Firmware before 2.5.6 allows remote attackers to degrade mesh performance with a forged broadcast-source packet. On receiving a previously unseen sender, a node requests its information without rejecting the reserved 0xFFFFFFFF broadcast address, causing the reply itself to be broadcast. Any attacker able to inject a mesh packet can trigger multiple transmissions from every receiving node, consuming shared radio bandwidth without authentication or user interaction.

The record

CVE
CVE-2024-51500
Published
Nov 4, 2024
Updated
Nov 5, 2024
Vendor
Meshtastic
Product
Meshtastic Firmware
Classifications
CWE-138, CWE-159, T1498.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 4, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 5, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2.5.6
  2. Affected versionversion=< 2.5.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Meshtastic · Meshtastic Firmwareversion=0 <2.5.6; version=< 2.5.6

Published CVSS scores

7.5NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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-138Improper Neutralization of Special Elements
CWE-159Improper Handling of Invalid Use of Special Elements
T1498.002Reflection Amplification

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo