CVE-2025-5872 Overview
CVE-2025-5872 is a missing authentication vulnerability affecting the eGauge EG3000 Energy Monitor version 3.6.3. The flaw resides in an unspecified portion of the Setting Handler component and allows a remote attacker to interact with configuration functionality without providing credentials. The weakness is classified under [CWE-287: Improper Authentication].
The exploit has been publicly disclosed, but no vendor response was reported at the time of publication. Public references list the issue in VulDB (submission #585486, entry #311631) and in a public CVE request repository on GitHub.
Critical Impact
Remote unauthenticated attackers can reach the Setting Handler over the network, potentially altering device configuration on affected EG3000 energy monitors.
Affected Products
- eGauge EG3000 Energy Monitor version 3.6.3
- Component: Setting Handler
- Vendor: eGauge Systems LLC (no vendor advisory published)
Discovery Timeline
- 2025-06-09 - CVE-2025-5872 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-5872
Vulnerability Analysis
The vulnerability is a missing authentication flaw in the Setting Handler component of the eGauge EG3000 Energy Monitor firmware 3.6.3. Access to functionality that should require authenticated sessions is exposed without credential validation. An attacker on a network path to the device can reach the affected handler and manipulate its inputs directly.
Because the EG3000 is a network-connected energy monitor, exposure typically occurs through the device's management interface. The confidentiality impact is limited according to available metrics, while integrity and availability impacts are not reported. Public disclosure of the issue increases the likelihood of opportunistic scanning against internet-exposed devices.
Root Cause
The root cause is the absence of an authentication check in the Setting Handler code path. Requests that should be gated by session validation or credential verification are processed as if the caller were authorized. This maps to [CWE-287], where authentication is either not enforced or is enforced incorrectly on a sensitive function.
Attack Vector
Exploitation occurs over the network without user interaction and without prior privileges. An attacker sends a crafted HTTP request to the Setting Handler endpoint on the device. Because no authentication is required, the request is honored. Public references indicate the exploit has been disclosed and may be reused by other actors. See the GitHub CVE Request Repository and VulDB #311631 for disclosure details.
No verified proof-of-concept code is included here; refer to the linked references for technical specifics.
Detection Methods for CVE-2025-5872
Indicators of Compromise
- Unexpected changes to EG3000 configuration values, user records, or measurement settings that occur without a corresponding authenticated administrator session.
- HTTP requests to the device's Setting Handler URL path originating from unfamiliar or external IP addresses.
- Device management sessions logged from source addresses outside the operator's normal administrative range.
Detection Strategies
- Inspect device access logs for requests to setting-related endpoints that lack an associated authenticated session identifier.
- Compare current device configuration snapshots against a known-good baseline to identify unauthorized modifications.
- Alert on network flows from untrusted segments to the EG3000 management interface using firewall or IDS telemetry.
Monitoring Recommendations
- Forward EG3000 web and system logs to a centralized log platform and retain them for correlation with network flow data.
- Monitor for scanning patterns targeting energy monitor default paths and TCP ports across operational technology (OT) network segments.
- Track configuration drift on all EG3000 devices with periodic automated audits.
How to Mitigate CVE-2025-5872
Immediate Actions Required
- Restrict network access to the EG3000 management interface using firewall rules that allow only trusted administrative hosts.
- Remove any direct exposure of EG3000 devices to the public internet; place them behind a VPN or bastion where possible.
- Audit current device configurations against a known-good baseline and revert unauthorized changes.
- Contact eGauge Systems LLC for guidance, as no vendor advisory has been published in the referenced sources.
Patch Information
No vendor patch or advisory is referenced in the available CVE data. The disclosure notes that the vendor was contacted but did not respond. Operators should monitor the eGauge Systems support channels for any future firmware release addressing the Setting Handler component in versions after 3.6.3.
Workarounds
- Segment EG3000 devices onto an isolated OT VLAN with strict ingress and egress filtering.
- Require VPN or jump-host access for any administrative interaction with the device.
- Disable remote management features on the device if operational requirements permit local-only administration.
- Monitor for and block anomalous HTTP traffic to the Setting Handler endpoint at the network perimeter.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
