CVE-2024-34026

⛔ critical

Summary

A stack-based buffer overflow vulnerability exists in the OpenPLC Runtime EtherNet/IP parser functionality of OpenPLC _v3 b4702061dc14d1024856f71b4543298d77007b88. A specially crafted EtherNet/IP request can lead to remote code execution. An attacker can send a series of EtherNet/IP requests to trigger this vulnerability.

CVSS Score

9.0

Critical

EPSS Score

6.6

Exploit Probability

Published Date

2024-09-18

First Seen: 2026-01-05

📊 Relative Risk Intelligence

This CVE is High Risk - more severe than 87.7% of all 328,009 vulnerabilities in our database.

#40,306

Top 25% most severe

Severity Percentile

🎯 CISA SSVC Assessment Updated: Sep 18, 2024

🔍 Exploitation Status

Poc

Proof-of-concept available

⚙️ Automatable

Requires human interaction

💥 Technical Impact

Total

Complete system compromise possible

🏆 Discovered By

Discovered by Jared Rittle of Cisco Talos.

SSVC data provided by CISA

Last Modified 2024-11-21

Source NVD 🔗

CVSS Vector 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

CWE IDs (Weakness Types)

CWE-121 CWE-787

📦 Affected Products 1

Vendor	Product	Status	Affected Versions
openplcproject	openplc_v3_firmware	Affected	v2024-04-04

🔗 References 2

https://talosintelligence.com/vulnerability_reports/...

Exploit Third Party Advisory

https://www.talosintelligence.com/vulnerability_repo...

🔗 Related CVEs 6

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-31156	🔶 medium	6.5	0.0	A path injection vulnerability exists in OpenPLC v3 (2c82b0e79c53f8c1f1458eee15fec173400d6e1a) as the binary program com...	2026-05-13
CVE-2024-36980	⚠️ high	7.5	0.4	An out-of-bounds read vulnerability exists in the OpenPLC Runtime EtherNet/IP PCCC parser functionality of OpenPLC_v3 b4...	2024-09-18
CVE-2024-36981	⚠️ high	7.5	0.2	An out-of-bounds read vulnerability exists in the OpenPLC Runtime EtherNet/IP PCCC parser functionality of OpenPLC_v3 b4...	2024-09-18
CVE-2024-39589	⚠️ high	7.5	0.2	Multiple invalid pointer dereference vulnerabilities exist in the OpenPLC Runtime EtherNet/IP parser functionality of Op...	2024-09-18
CVE-2024-39590	⚠️ high	7.5	0.2	Multiple invalid pointer dereference vulnerabilities exist in the OpenPLC Runtime EtherNet/IP parser functionality of Op...	2024-09-18
CVE-2024-37741	🔶 medium	5.4	0.4	OpenPLC 3 through 9cd8f1b allows XSS via an SVG document as a profile picture.	2024-06-28

These CVEs affect the same products