Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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 malformed requests crash the HMI service with availability-only impact, so PR:N/AC:L/A:H and C:N/I:N.
Primary rating from Vendor (schneider).
CVSS VectorVendor: schneider
Lifecycle Timeline
1DescriptionCVE.org
CWE-476 NULL Pointer Dereference vulnerability exists that could cause a denial-of-service condition, rendering the device’s HMI and configuration functionality unavailable when malformed requests are received over exposed network interfaces.
AnalysisAI
Denial-of-service in Schneider Electric PowerLogic P7 power metering devices allows remote, unauthenticated attackers to crash the device's HMI and configuration functionality by sending malformed requests to exposed network interfaces. The flaw stems from a NULL pointer dereference (CWE-476) that renders local management and configuration unavailable until recovery. No public exploit identified at time of analysis, and the issue is not listed in CISA KEV; the CVSS 4.0 base score of 8.7 reflects a high availability impact with no confidentiality or integrity exposure.
Technical ContextAI
The PowerLogic P7 is a Schneider Electric power-monitoring/metering and protection relay device (cpe:2.3:a:schneider_electric:powerlogic™_p7) commonly deployed in industrial and critical-infrastructure electrical distribution environments, where it exposes a web/HMI and configuration service over the network. The root cause is CWE-476 (NULL Pointer Dereference): the device's request-handling logic dereferences a pointer that was never initialized or was set to NULL when processing specially malformed input, causing the affected process or firmware service to fault. Because the affected component is the embedded HMI/configuration interface rather than the metering measurement core, exploitation degrades device manageability and monitoring rather than corrupting data, consistent with the VC:N/VI:N/VA:H impact profile.
RemediationAI
Patch status: Patch available per vendor advisory - apply the fixed firmware identified in Schneider Electric notice SEVD-2026-160-03 (https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2026-160-03&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2026-160-03.pdf); the exact patched version is not stated in the provided data, so confirm it against that advisory. Where immediate patching is not possible, reduce exposure of the management/HMI interface: place the PowerLogic P7 on an isolated OT/management VLAN and block its web/configuration ports from untrusted networks at the firewall (trade-off: remote management must then go through a jump host or VPN), restrict access to the HMI/configuration endpoint to a small allowlist of trusted engineering workstations (trade-off: complicates ad-hoc maintenance), and disable or firewall any internet-facing access entirely. Because the impact is a DoS rather than code execution or data exposure, monitoring for repeated device reboots or HMI unavailability is a reasonable detective control while the patch is staged.
More in Powerlogic P7
View allAuthenticated command injection in Schneider Electric PowerLogic P7 power metering devices allows a privileged user to e
Denial-of-service in Schneider Electric PowerLogic P7 power monitoring devices allows an authenticated attacker to crash
Same weakness CWE-476 – NULL Pointer Dereference
View allSame technique Denial Of Service
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-39433
GHSA-r5gq-r69x-5f8p