EPSON Printers Improper Input Validation (CVE-2023-38556)

high Tenable OT Security Plugin ID 505064

Synopsis

The remote OT asset is affected by a vulnerability.

Description

Improper input validation vulnerability in SEIKO EPSON printer Web Config allows a remote attacker to turned off the printer. [Note] Web Config is the software that allows users to check the status and change the settings of SEIKO EPSON printers via a web browser. Web Config is pre-installed in some printers provided by SEIKO EPSON CORPORATION. For the details of the affected product names/model numbers, refer to the information provided by the vendor.

This plugin only works with Tenable.ot.
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Solution

Refer to the vendor advisory.

Plugin Details

Severity: High

ID: 505064

File Name: tenable_ot_epson_CVE-2023-38556.nasl

Version: 1.2

Type: remote

Family: Tenable.ot

Published: 2/5/2026

Updated: 2/6/2026

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2023-38556

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:epson:ep-802a_firmware:-, cpe:/o:epson:ep-902a_firmware:-, cpe:/o:epson:px-201_firmware:-, cpe:/o:epson:ep-801a_firmware:-, cpe:/o:epson:px-502a_firmware:-, cpe:/o:epson:pa-tcu1_firmware:-, cpe:/o:epson:pm-t960_firmware:-, cpe:/o:epson:px-601f_firmware:-, cpe:/o:epson:ep-901a_firmware:-, cpe:/o:epson:px-602f_firmware:-, cpe:/o:epson:ep-901f_firmware:-, cpe:/o:epson:pm-t990_firmware:-

Required KB Items: Tenable.ot/EPSON

Exploit Ease: No known exploits are available

Patch Publication Date: 8/2/2023

Vulnerability Publication Date: 8/2/2023

Reference Information

CVE: CVE-2023-38556

CWE: 20

Detections

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