CVE-2023-43776 | Weak encoding vulnerability in easyE4

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).

Published: 2023-10-17 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-43776 is rated Low Risk (29.6/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.03%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-43776

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 0.06% 0.03% -0.03%
2 2025-11-18 0.03% 0.06% +0.03%
3 2025-04-15 — 0.03% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-43776

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.8 3.1 MEDIUM
CVSS:3.1/AV:P/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H Click to expand
Attack vector (AV:P)
Hands-on access—USB, keyboard, opening the case—not something you do purely over the wire.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 0.2 6.0 [email protected]
6.6 3.1 MEDIUM
CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:P)
Hands-on access—USB, keyboard, opening the case—not something you do purely over the wire.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 0.7 5.9 [email protected]

Weakness enumeration for CVE-2023-43776

Affected software / configurations for CVE-2023-43776

Vendor Product Version Raw CPE
eaton easy-box-e4-ac1_firmware < 2.02 cpe:2.3:o:eaton:easy-box-e4-ac1_firmware:*:*:*:*:*:*:*:*
eaton easy-box-e4-dc1_firmware < 2.02 cpe:2.3:o:eaton:easy-box-e4-dc1_firmware:*:*:*:*:*:*:*:*
eaton easy-box-e4-uc1_firmware < 2.02 cpe:2.3:o:eaton:easy-box-e4-uc1_firmware:*:*:*:*:*:*:*:*
eaton easy-e4-ac-12rc1p_firmware < 2.02 cpe:2.3:o:eaton:easy-e4-ac-12rc1p_firmware:*:*:*:*:*:*:*:*
eaton easy-e4-ac-12rcx1p_firmware < 2.02 cpe:2.3:o:eaton:easy-e4-ac-12rcx1p_firmware:*:*:*:*:*:*:*:*
eaton easy-e4-ac-16re1p_firmware < 2.02 cpe:2.3:o:eaton:easy-e4-ac-16re1p_firmware:*:*:*:*:*:*:*:*
eaton easy_e4-ac-8re1p_firmware < 2.02 cpe:2.3:o:eaton:easy_e4-ac-8re1p_firmware:*:*:*:*:*:*:*:*
eaton easy-e4-dc-12tc1p_firmware < 2.02 cpe:2.3:o:eaton:easy-e4-dc-12tc1p_firmware:*:*:*:*:*:*:*:*
eaton easy-e4-dc-12tcx1p_firmware < 2.02 cpe:2.3:o:eaton:easy-e4-dc-12tcx1p_firmware:*:*:*:*:*:*:*:*
eaton easy-e4-dc-16te1p_firmware < 2.02 cpe:2.3:o:eaton:easy-e4-dc-16te1p_firmware:*:*:*:*:*:*:*:*
eaton easy-e4-dc-4pe1p_firmware < 2.02 cpe:2.3:o:eaton:easy-e4-dc-4pe1p_firmware:*:*:*:*:*:*:*:*
eaton easy-e4-dc-6ae1p_firmware < 2.02 cpe:2.3:o:eaton:easy-e4-dc-6ae1p_firmware:*:*:*:*:*:*:*:*
eaton easy-e4-dc-8te1p_firmware < 2.02 cpe:2.3:o:eaton:easy-e4-dc-8te1p_firmware:*:*:*:*:*:*:*:*
eaton easy-e4-uc-12rc1p_firmware < 2.02 cpe:2.3:o:eaton:easy-e4-uc-12rc1p_firmware:*:*:*:*:*:*:*:*
eaton easy-e4-uc-12rcx1p_firmware < 2.02 cpe:2.3:o:eaton:easy-e4-uc-12rcx1p_firmware:*:*:*:*:*:*:*:*
eaton easy-e4-uc-16re1_firmware < 2.02 cpe:2.3:o:eaton:easy-e4-uc-16re1_firmware:*:*:*:*:*:*:*:*
eaton easy-e4-uc-16re1p_firmware < 2.02 cpe:2.3:o:eaton:easy-e4-uc-16re1p_firmware:*:*:*:*:*:*:*:*
eaton easy-e4-uc-8re1p_firmware < 2.02 cpe:2.3:o:eaton:easy-e4-uc-8re1p_firmware:*:*:*:*:*:*:*:*
eaton xv-102-a035tqrb-1e4_firmware < 2.02 cpe:2.3:o:eaton:xv-102-a035tqrb-1e4_firmware:*:*:*:*:*:*:*:*
eaton xv-102-a3-57tvrb-1e4_firmware < 2.02 cpe:2.3:o:eaton:xv-102-a3-57tvrb-1e4_firmware:*:*:*:*:*:*:*:*
eaton xv100-box-e4-dc1_firmware < 2.02 cpe:2.3:o:eaton:xv100-box-e4-dc1_firmware:*:*:*:*:*:*:*:*
eaton xv100-box-e4-uc1_firmware < 2.02 cpe:2.3:o:eaton:xv100-box-e4-uc1_firmware:*:*:*:*:*:*:*:*

References for CVE-2023-43776

cvelogic Threat Intelligence