CVE-2024-42484Network attack vector

Memory corruption via unchecked group address count

Published Sep 12, 2024 · Updated Sep 12, 2024

Out-of-bounds read in Espressif Systems ESP-NOW 2.5.1 and earlier allows remote attackers to corrupt memory via a group message. The espnow_recv_cb receiver trusts addrs_num when iterating addrs_list without first verifying that the payload contains every claimed address. The attack requires wireless reachability to an ESP-NOW receiver and can disclose adjacent memory or interrupt firmware operation.

CVSS severity6.5
Medium
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Espressif Systems ESP-NOW 2.5.1 and earlier allows remote attackers to corrupt memory via a group message. The espnow_recv_cb receiver trusts addrs_num when iterating addrs_list without first verifying that the payload contains every claimed address. The attack requires wireless reachability to an ESP-NOW receiver and can disclose adjacent memory or interrupt firmware operation.

The record

CVE
CVE-2024-42484
Published
Sep 12, 2024
Updated
Sep 12, 2024
Vendor
Espressif Systems
Product
ESP-NOW
Classifications
CWE-125
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 12, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 12, 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=0 <2.5.2
  2. Affected versionversion=< 2.5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Espressif Systems · ESP-NOWversion=0 <2.5.2; version=< 2.5.2

Published CVSS scores

6.5GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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.

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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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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