CVE-2023-38556

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.

Published: 2023-08-02 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-38556 is rated Moderate Risk (46.4/100): CVSS High severity, with low exploitation likelihood (EPSS 0.65%). Review affected assets and schedule remediation.

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-2023-38556

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 2026-06-15 0.37% 0.65% +0.28%
2 2026-04-27 0.30% 0.37% +0.07%
3 2025-11-21 — 0.30% —

Full EPSS history (13 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-38556

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
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:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2023-38556

Affected software / configurations for CVE-2023-38556

Vendor Product Version Raw CPE
epson ep-801a_firmware — cpe:2.3:o:epson:ep-801a_firmware:-:*:*:*:*:*:*:*
epson ep-802a_firmware — cpe:2.3:o:epson:ep-802a_firmware:-:*:*:*:*:*:*:*
epson ep-901a_firmware — cpe:2.3:o:epson:ep-901a_firmware:-:*:*:*:*:*:*:*
epson ep-901f_firmware — cpe:2.3:o:epson:ep-901f_firmware:-:*:*:*:*:*:*:*
epson ep-902a_firmware — cpe:2.3:o:epson:ep-902a_firmware:-:*:*:*:*:*:*:*
epson pa-tcu1_firmware — cpe:2.3:o:epson:pa-tcu1_firmware:-:*:*:*:*:*:*:*
epson pm-t960_firmware — cpe:2.3:o:epson:pm-t960_firmware:-:*:*:*:*:*:*:*
epson pm-t990_firmware — cpe:2.3:o:epson:pm-t990_firmware:-:*:*:*:*:*:*:*
epson px-201_firmware — cpe:2.3:o:epson:px-201_firmware:-:*:*:*:*:*:*:*
epson px-502a_firmware — cpe:2.3:o:epson:px-502a_firmware:-:*:*:*:*:*:*:*
epson px-601f_firmware — cpe:2.3:o:epson:px-601f_firmware:-:*:*:*:*:*:*:*
epson px-602f_firmware — cpe:2.3:o:epson:px-602f_firmware:-:*:*:*:*:*:*:*

References for CVE-2023-38556

cvelogic Threat Intelligence