Contec SolarView Compact Remote Code Execution (RCE) Vulnerability Advisory (CVE-2022-29303)
Executive & SecOps Summary
SECOPS ASSESSMENTContec SolarView Compact version 6.00 and prior.
Unauthenticated attackers can execute arbitrary OS commands via the web interface, leading to complete system compromise.
Apply the latest firmware updates immediately and restrict external internet access to the management interface.
Affected Products & Version Scope
Remediation & Live Workaround Commands
PATCH & WORKAROUND1. Official Patch & Version Upgrade Commands
Apply the latest secure firmware version provided by Contec. If direct patching is delayed, ensure the device is isolated from untrusted networks.
2. Temporary Workaround & Hardening Configuration
Restrict access to the web interface using firewall rules. Below is an example of configuring iptables to block public access and only allow a trusted management subnet.
# Block all public HTTP/HTTPS traffic to the device
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
# Allow access only from a trusted management IP (e.g., 192.168.1.100)
iptables -I INPUT -s 192.168.1.100 -p tcp --dport 80 -j ACCEPT
iptables -I INPUT -s 192.168.1.100 -p tcp --dport 443 -j ACCEPT3. Log Audit & IoC Verification Commands
Inspect web server access logs for suspicious requests targeting conf_mail.php containing shell metacharacters.
# Scan web access logs for exploit attempts targeting conf_mail.php
grep -i 'conf_mail.php' /var/log/nginx/access.log | grep -E '(%3b|%7c|;|\||`|\$)'
# Check for active suspicious shell processes spawned by the web server user
ps -ef | grep -E '(apache|nginx|www-data)' | grep -E '(sh|bash|ash|nc|curl|wget)'Block Exploits Instantly with Managed Virtual Patching Rules
Can't patch production immediately? Deploy managed WAF rules at the edge to intercept RCE, SQLi, and deserialization payloads before they hit your origin server.
Technical Root Cause & Exploitation Mechanics
1. Vulnerability Overview & Root Cause
This vulnerability (CVE-2022-29303) is an OS Command Injection flaw located in the conf_mail.php script of the Contec SolarView Compact web management console. Due to a lack of proper input validation and sanitization on user-supplied parameters, the application directly passes unsanitized input to system shell execution functions, allowing arbitrary command execution.
2. Exploitation Mechanics & Attack Scenario
An unauthenticated remote attacker can send a crafted HTTP request targeting conf_mail.php. By embedding shell metacharacters such as semicolons (;), pipes (|), or backticks (` ``) into parameters associated with mail configuration or testing, the attacker forces the underlying operating system to execute arbitrary commands. This can be leveraged to establish a reverse shell or download and execute malicious payloads.
3. Infrastructure & Business Impact
Since SolarView Compact devices are deployed to monitor and manage solar power generation facilities, a successful compromise could allow attackers to disrupt power generation, manipulate monitoring data, or pivot into internal Industrial Control Systems (ICS/OT) networks. This vulnerability is actively exploited in the wild and is listed in the CISA KEV catalog.
Official Vendor Advisories & References
SolarView Compact ver.6.00 was discovered to contain a command injection vulnerability via conf_mail.php.
Frequently Asked SecOps Questions (CVE-2022-29303)
FAQQ1. How critical is CVE-2022-29303 and is it actively exploited in the wild?
CVE-2022-29303 is rated CVSS 9.8 (CRITICAL) with a 30-day EPSS exploitation probability of 98.0%. It is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, requiring immediate emergency remediation.
Q2. Which vendors and products are affected by CVE-2022-29303?
Primary impacted vendors include contec across solarview compact. Scope summary: Contec SolarView Compact version 6.00 and prior
Q3. What temporary mitigations or workarounds exist for CVE-2022-29303 before patching?
[Mitigation] Apply the latest firmware updates immediately and restrict external internet access to the management interface. Follow the CLI remediation commands and interactive SecOps checklist on this page to restrict exposure prior to your maintenance window.
Generate an Internal Engineering Notice or CISO Report for CVE-2022-29303
Instantly format this advisory into an executive CISO summary or engineering patch ticket.
🔗 Related Advisories in Similar Stack (contec)
View Category →LiteLLM Proxy Server MCP Test Endpoints Remote Code Execution Vulnerability Advisory (CVE-2026-42271)
[Affected Scope] LiteLLM proxy server environments running versions 1.74.2 to before 1.83.7
Ahsay AhsayCBS Replication Receiver Remote Code Execution (RCE) Vulnerability Advisory (CVE-2026-105134)
[Affected Scope] AhsayCBS versions up to 9.15.2.69 and 10.3.4.44, specifically the Replication Receiver component
Critical RCE in Nextcloud Collabora Online Built-in CODE Server (CVE-2026-110447)
[Affected Scope] Collabora Online Built-in CODE Server (richdocumentscode) for Nextcloud before version 26.4.303.
BeyondTrust Remote Support and Privileged Remote Access Pre-Authentication Remote Code Execution (RCE) Vulnerability (CVE-2026-1731) Urgent Security Advisory
[Affected Scope] BeyondTrust Remote Support (RS) and certain older versions of Privileged Remote Access (PRA).
Subscribe to Daily Vulnerability Briefings & KEV Alerts
Concise morning briefings for SecOps, DevSecOps, and SRE teams covering newly exploited CVEs and mitigation priorities.