CVE-2026-82795: SolarView Compact RCE Vulnerability

CVE-2026-82795 is a remote code execution vulnerability in SolarView Compact affecting Schedule Settings and Mail Send Setting. Authenticated attackers can exploit this flaw to execute arbitrary OS commands. This article covers technical details, affected versions, security impact, and mitigation strategies.

CVE-2026-82795 Overview

CVE-2026-82795 is a stored cross-site scripting (XSS) vulnerability in Contec SolarView Compact, a solar power monitoring appliance used across renewable energy deployments. The flaw resides in the Schedule Settings and Mail Send Setting functionality of the product's web interface. An authenticated attacker can inject arbitrary script into these settings pages. According to the vendor advisory, successful exploitation can lead to execution of an arbitrary operating system command in the context of the product. The vulnerability is tracked under [CWE-79] and requires user interaction to trigger the injected payload.

Critical Impact
Authenticated attackers can inject stored scripts that, when rendered, lead to arbitrary OS command execution on the SolarView Compact device.

Affected Products

Contec SolarView Compact (Schedule Settings component)
Contec SolarView Compact (Mail Send Setting component)
Refer to the Contec Security Information Document for affected firmware versions

Discovery Timeline

2026-09-14 - CVE-2026-82795 published to NVD
2026-09-16 - Last updated in NVD database

Technical Details for CVE-2026-82795

Vulnerability Analysis

The vulnerability is a stored cross-site scripting flaw affecting two configuration areas of SolarView Compact: Schedule Settings and Mail Send Setting. The web application accepts user-supplied input in these forms without adequate output encoding or input sanitization. When an operator later views the affected settings page, the browser renders the attacker-controlled payload as executable script. The vendor advisory further notes that exploitation can result in arbitrary OS command execution on the device, indicating the injected script can pivot into privileged administrative functionality exposed by the product's management interface. The attack requires an authenticated session and user interaction to trigger the stored payload.

Root Cause

The root cause is improper neutralization of input during web page generation [CWE-79]. Values submitted to the Schedule Settings and Mail Send Setting endpoints are stored and later reflected into HTML responses without context-appropriate encoding. This allows script tags and event handlers to persist in the device configuration and execute in subsequent administrator sessions.

Attack Vector

An attacker who can log in to the SolarView Compact web interface submits a crafted payload through the vulnerable Schedule Settings or Mail Send Setting form. The payload is stored on the device. When a legitimate administrator navigates to the affected settings page, the browser executes the injected script under the origin of the management interface. The script can then invoke administrative endpoints that expose command execution capability, resulting in arbitrary OS command execution on the appliance. See the JVN Security Vulnerability Report for additional technical context.

Detection Methods for CVE-2026-82795

Indicators of Compromise

Unexpected HTML, <script> tags, or JavaScript event handlers stored in Schedule Settings or Mail Send Setting configuration fields.
Administrator browser sessions issuing unexpected requests to command or configuration endpoints of the SolarView Compact interface.
Modification of scheduled tasks, mail recipients, or system settings without a corresponding administrator action.

Detection Strategies

Inspect device configuration exports for HTML metacharacters or script-like content in fields that should contain only plain text.
Enable and review web server access logs for POST requests to Schedule Settings and Mail Send Setting endpoints originating from unusual source addresses.
Correlate administrator login events with subsequent configuration changes to identify sessions that produced unexpected activity.

Monitoring Recommendations

Restrict management interface access to a dedicated administrative network segment and monitor that segment for anomalous HTTP traffic.
Alert on repeated failed authentication attempts to the SolarView Compact web interface, which may indicate credential guessing prior to exploitation.
Capture and retain administrator browser telemetry where possible to surface script execution originating from device settings pages.

How to Mitigate CVE-2026-82795

Immediate Actions Required

Apply the firmware update referenced in the Contec Security Information Document as soon as it is available for your deployment.
Rotate administrator credentials on all SolarView Compact devices and enforce strong, unique passwords.
Audit Schedule Settings and Mail Send Setting fields on each device for previously injected payloads and clear any suspicious content.

Patch Information

Contec has published a security advisory for SolarView Compact. Consult the vendor advisory and the JVN Security Vulnerability Report for the fixed firmware version and upgrade instructions applicable to your model.

Workarounds

Isolate the SolarView Compact management interface from the internet and untrusted networks using firewall rules or ACLs.
Limit administrative access to a small set of hardened workstations dedicated to operational technology management.
Instruct administrators to avoid browsing other sites while authenticated to the SolarView Compact interface to reduce the risk of session-based abuse.

bash

# Configuration example: restrict access to the management interface
# Replace 192.0.2.0/24 with your administrative subnet
iptables -A INPUT -p tcp --dport 80 -s 192.0.2.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -s 192.0.2.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP