CVE-2024-24947Network attack vector

PLC crash via attacker-sized CurrDir heap clearing

Published May 28, 2024 · Updated Feb 13, 2025

Heap-based buffer overflow in AutomationDirect P3-550E 1.2.10.9 allows remote attackers to crash the PLC via a crafted UDP packet. The CurrDir allocation-failure path passes an attacker-controlled path length to memset, overwriting heap allocations after the packet buffer. Exploitation is unauthenticated on UDP port 9999 but requires the attacker to constrain heap resources until an allocation under 256 bytes fails.

CVSS severity8.2
High
EPSS probability0.84%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in AutomationDirect P3-550E 1.2.10.9 allows remote attackers to crash the PLC via a crafted UDP packet. The CurrDir allocation-failure path passes an attacker-controlled path length to memset, overwriting heap allocations after the packet buffer. Exploitation is unauthenticated on UDP port 9999 but requires the attacker to constrain heap resources until an allocation under 256 bytes fails.

The record

CVE
CVE-2024-24947
Published
May 28, 2024
Updated
Feb 13, 2025
Vendor
AutomationDirect
Product
P3-550E
Classifications
CWE-787, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 28, 2024CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2025Record 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=1.2.10.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

AutomationDirect · P3-550Eversion=1.2.10.9

Published CVSS scores

8.8AutomationDirectCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
8.2Cisco TalosCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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-787Out-of-bounds Write
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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