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Delta Electronics DVP12SE PLC

CRITICAL
CVSS 9.8
Date 2026-06-30T06:00:00+00:00
Source cisa-csaf
Published by CISA

// Description

Successful exploitation of these vulnerabilities could allow an attacker to remotely issue commands, modify operational values, interfere with control logic, and alter device behavior without authentication or privilege enforcement.

// Vulnerabilities (2)

CVE ID CVSS Score Severity Description
CVE-2026-12818 9.8 critical
Delta Electronics DVP12SE PLCs are susceptible to a resource allocation vulnerability without limits or throttling (CWE-770) within their Modbus TCP service. A remote attacker could exploit this vulnerability by flooding the Modbus port (TCP/502) with a continuous stream of raw network packets or specially crafted and malformed packets.
CVE-2026-12819 9.8 critical
The Delta Electronics DVP12SE PLC exposes a Modbus TCP service over a specified port without authentication or access control, permitting unauthenticated interaction with security-sensitive PLC functions. The device accepts Modbus commands from any reachable network source without requiring credentials, privilege validation, or operator approval, allowing unauthorized read and write access to coils, holding registers, operational memory, relay states, and process control functions.

// Affected Products (1)

Vendor Product Asset Type Purdue Level Firmware
Delta Electronics Unknown plc
L1
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// Remediations (4)

Mitigation: For more information refer to Delta Electronic's advisory page https://www.deltaww.com/en-US/service
For more information refer to Delta Electronic's advisory page https://www.deltaww.com/en-US/service-support/product-cybersecurity/advisory.
Mitigation: Enable the IP Filter feature: Configure and enable the PLC's built-in IP Filter function via the pro
Enable the IP Filter feature: Configure and enable the PLC's built-in IP Filter function via the programming software. Restrict access exclusively to the IP addresses of trusted devices (such as designated HMI panels or SCADA hosts) to block unauthorized network access.Set up PLC password protection: Enable password protection for the PLC within the programming software to ensure the device's core control logic and parameters cannot be easily downloaded, overwritten, or tampered with.Implement network isolation and firewall protection: Deploy the PLC within an independent local area network (OT control network) secured by a firewall. Never connect the device directly to the office network or the Internet. If remote access is required, enforce the use of a secure, authorized VPN tunnel.
Mitigation: Delta Electronics recommends users apply the following workarounds:
Delta Electronics recommends users apply the following workarounds:
Mitigation: Delta Electronics is aware of these vulnerabilities and is currently working on a fix.
Delta Electronics is aware of these vulnerabilities and is currently working on a fix.

// References