EUVD-2026-40258
GHSA-xpw2-pg2w-j67h
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Remote, low-complexity, unauthenticated Modbus access (AV:N/AC:L/PR:N/UI:N) grants full read/write control of the PLC, giving high C/I/A with no scope change.
Primary rating from Vendor (Deltaww).
CVSS VectorVendor: Deltaww
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
1DescriptionCVE.org
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.
AnalysisAI
Unauthenticated Modbus TCP exposure on the Delta Electronics DVP12SE programmable logic controller lets any network-reachable attacker invoke security-sensitive PLC functions - reading and writing process registers, coils, and configuration - with no credentials or access control. The flaw (CWE-306, Missing Authentication for a Critical Function) carries a CVSS 4.0 base of 9.3 and is documented in Delta advisory PCSA-2026-00011 alongside CVE-2026-12818. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The sole prerequisite is network TCP reachability to the DVP12SE's Modbus/TCP service on its configured port (Modbus default 502); per the CVSS vector PR:N/UI:N there is no authentication and no user interaction required, and exploitation works against the device's default unauthenticated Modbus interface. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Signals are largely consistent and point to genuine high priority where the device is network-exposed. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who can reach the DVP12SE's Modbus/TCP port - for example via a flat OT network, a compromised engineering workstation, or an internet-exposed device - connects with a standard Modbus client and issues write commands to PLC registers and coils without supplying any credentials. With AV:N/AC:L/PR:N, this requires only TCP connectivity and openly documented Modbus function codes, allowing the attacker to read process state or alter outputs and disrupt the controlled physical process. … |
| Remediation | Patch available per vendor advisory - review Delta PCSA-2026-00011 (https://filecenter.deltaww.com/news/download/doc/Delta-PCSA-2026-00011_DVP12SE%20Multiple%20Vulnerabilities%20(CVE-2026-12818,%20CVE-2026-12819)_v1.0.pdf) for the corrective firmware version, as no exact fix version was included in the supplied data and should not be assumed. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Conduct urgent inventory of all Delta DVP12SE controllers and determine network exposure (internet connectivity, remote access points, DMZ placement). …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
Same technique Authentication Bypass
View allShare
External POC / Exploit Code
Leaving vuln.today