CVE-2026-82794: SolarView Compact RCE Vulnerability

CVE-2026-82794 Overview

CVE-2026-82794 is an operating system (OS) command injection vulnerability [CWE-78] in Contec SolarView Compact. The flaw resides in the Schedule Settings functionality. An authenticated attacker can inject arbitrary OS commands that the device executes with the privileges of the underlying service. SolarView Compact is a solar power monitoring appliance widely deployed in photovoltaic installations, which places energy-sector operators at direct risk.

Critical Impact
Authenticated attackers can execute arbitrary operating system commands on affected SolarView Compact devices, compromising confidentiality, integrity, and availability of the monitoring appliance.

Affected Products

Contec SolarView Compact (Schedule Settings component)
Refer to the Contec Security Information Document for the vendor's list of affected firmware versions
See the JVN Vulnerability Report for coordinated disclosure details

Discovery Timeline

2026-09-14 - CVE-2026-82794 published to the National Vulnerability Database (NVD)
2026-09-16 - Last updated in NVD database

Technical Details for CVE-2026-82794

Vulnerability Analysis

The vulnerability affects the Schedule Settings feature exposed through the SolarView Compact management interface. Input supplied to this feature reaches an OS command interpreter without adequate sanitization or argument separation. An authenticated user can therefore embed shell metacharacters within scheduling parameters and cause the underlying operating system to execute attacker-controlled commands.

Successful exploitation yields command execution in the context of the SolarView service account. That access enables the attacker to read configuration data, alter monitoring output, disrupt scheduled tasks, or pivot deeper into the operational technology (OT) network. Because SolarView Compact commonly runs at the boundary between operational and corporate networks, downstream impact can extend beyond the appliance itself.

Root Cause

The root cause is improper neutralization of special elements used in an OS command [CWE-78]. The Schedule Settings handler concatenates user-controlled input into a command string rather than using parameterized system calls or a strict allowlist of accepted values. Shell metacharacters such as ;, |, &, and backticks are treated as command delimiters rather than data.

Attack Vector

Exploitation requires network access to the SolarView Compact web interface and a valid low-privileged account. The attacker submits a crafted request to the Schedule Settings endpoint, embedding an injected command within a scheduling field. The device processes the field and invokes the injected command through the system shell. No user interaction is required beyond the attacker's own authenticated session. The Exploit Prediction Scoring System (EPSS) currently places the probability of near-term exploitation in a moderate range relative to other vulnerabilities.

No public proof-of-concept exploit is currently referenced in the enriched data. See the JVN Vulnerability Report for technical details from the coordinating body.

Detection Methods for CVE-2026-82794

Indicators of Compromise

Unexpected child processes spawned by the SolarView Compact web server or scheduler process, particularly shells such as /bin/sh or /bin/busybox.
HTTP POST requests to Schedule Settings endpoints containing shell metacharacters (;, |, &, $(, backticks) inside scheduling parameters.
New or modified cron entries, scheduled tasks, or startup scripts on the appliance that do not match the operator's configuration baseline.
Outbound network connections from the SolarView Compact device to unfamiliar external hosts.

Detection Strategies

Inspect web server access logs on the appliance for anomalous parameter values sent to Schedule Settings endpoints.
Correlate authentication events with subsequent configuration changes to identify accounts abusing scheduling functionality.
Deploy network intrusion detection signatures that flag shell metacharacters in HTTP request bodies destined for SolarView management interfaces.

Monitoring Recommendations

Forward device syslog and web access logs to a centralized log platform for retention and analysis.
Baseline normal scheduler behavior and alert on deviations in process lineage or configuration files.
Monitor egress traffic from OT segments hosting SolarView Compact devices for connections to unexpected destinations.

How to Mitigate CVE-2026-82794

Immediate Actions Required

Apply the firmware update published by Contec as described in the Contec Security Information Document.
Restrict network access to the SolarView Compact management interface so that only authorized administrative hosts can reach it.
Rotate all local accounts on the appliance and remove any accounts that are unused or unnecessary.
Audit Schedule Settings entries and cron-like tasks on each device for unauthorized modifications.

Patch Information

Contec has published a security advisory and firmware guidance for SolarView Compact. Operators should consult the Contec Security Information Document and the JVN Vulnerability Report to identify affected versions and the fixed firmware release, then follow the vendor's upgrade procedure.

Workarounds

Place SolarView Compact devices behind a firewall or VPN gateway and block internet-facing exposure of the management interface.
Enforce strong, unique credentials and limit Schedule Settings access to a small set of trusted administrator accounts.
Segment the OT network hosting SolarView devices from general corporate and internet-facing networks.
Continuously monitor the appliance for unauthorized configuration changes until the firmware patch is applied.

bash

# Configuration example: restrict access to the SolarView management interface
# Example iptables rules on an upstream gateway (replace addresses with your environment)
iptables -A FORWARD -s 10.0.10.0/24 -d 192.0.2.25 -p tcp --dport 80 -j ACCEPT
iptables -A FORWARD -d 192.0.2.25 -p tcp --dport 80 -j DROP
iptables -A FORWARD -d 192.0.2.25 -p tcp --dport 443 -j DROP