Weak encoding vulnerability in easyE4

published 2023-10-17 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-48153

cvss: 6.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.1%; EPSS 0.1% chance of exploitation in 30 days, percentile 3%
public exploits: 0; none known

Eaton easyE4 PLC offers a device password protection functionality to facilitate a secure connection and prevent unauthorized access. It was observed that the device password was stored with a weak encoding algorithm in the easyE4 program file when exported to SD card (*.PRG file ending).

Patch / fix

fixed in 1

Eaton easyE4 2.02

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 2 y ago (2024-09-13)

Exploit prediction

0.14% chance of exploitation in the next 30 days, higher than 3% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.8	CVSS:3.1/AV:P/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H
NVD	3.1	6.6	CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Eaton easyE4

Classification

Weakness

CWE-261 Weak Encoding for Password
CWE-326 Inadequate Encryption Strength

References

eaton.com /content/dam/eaton/company/news-insights/cybersecurity/security-bulletins/etn-va-2023-1010.pdf
mitigation, vendor-advisory

Sources

CVE List CVE-2023-43776
NVD CVE-2023-43776

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Summary