CVE-2022-26318 in Firebox
Summary
by MITRE • 03/04/2022
On WatchGuard Firebox and XTM appliances, an unauthenticated user can execute arbitrary code, aka FBX-22786. This vulnerability impacts Fireware OS before 12.7.2_U2, 12.x before 12.1.3_U8, and 12.2.x through 12.5.x before 12.5.9_U2.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 01/29/2025
This critical vulnerability exists within WatchGuard Firebox and XTM appliances running specific versions of Fireware OS, representing a severe remote code execution flaw that can be exploited by unauthenticated attackers. The vulnerability CVE-2022-26318 allows malicious actors to gain full system control without requiring any credentials, making it particularly dangerous in network security environments where these appliances serve as primary defense mechanisms. The affected software versions span multiple release branches including Fireware OS 12.7.2_U2 and earlier, 12.1.3_U8 and earlier, and 12.5.9_U2 and earlier within the 12.2.x through 12.5.x series, indicating this flaw has persisted across several major releases and represents a significant gap in the vendor's security posture.
The technical nature of this vulnerability stems from improper input validation and insufficient access controls within the appliance's web interface and management services. Attackers can leverage this weakness to inject and execute arbitrary code on the target system, potentially leading to complete compromise of the network security appliance. This flaw operates at the application layer and can be exploited through web-based interfaces, making it accessible to attackers who may only need basic network connectivity to the appliance. The vulnerability's classification aligns with CWE-79 which describes cross-site scripting vulnerabilities, though this particular instance extends beyond web interface exploitation to enable full system code execution. The attack vector typically involves sending specially crafted requests to the appliance's management interface, bypassing authentication mechanisms entirely.
The operational impact of this vulnerability extends far beyond simple system compromise, as WatchGuard appliances serve as critical network security infrastructure components protecting enterprise environments. When exploited, this vulnerability can result in complete network infiltration, data exfiltration, and disruption of security controls that organizations rely upon for protection against external threats. The unauthenticated nature of the exploit means that attackers can initiate attacks without any prior access credentials, making it particularly concerning for organizations that may not have proper network segmentation or monitoring in place. Organizations using affected appliances face significant risk of unauthorized access to their network security controls, potentially allowing attackers to modify firewall rules, disable security features, or establish persistent access points within their network infrastructure.
Organizations should immediately implement mitigation strategies including immediate firmware updates to versions 12.7.2_U2, 12.1.3_U8, or 12.5.9_U2 depending on their current software version, as these releases contain the necessary patches to address the vulnerability. Network segmentation and access control measures should be enhanced to limit direct internet exposure of these appliances, while implementing additional monitoring and logging to detect potential exploitation attempts. Security teams should also conduct comprehensive vulnerability assessments to identify all affected appliances within their network infrastructure and establish incident response procedures for potential exploitation. The vulnerability's presence in multiple release branches indicates the need for thorough inventory management and patch deployment across all affected systems, as organizations may have appliances running different software versions across their network. This vulnerability demonstrates the critical importance of maintaining current security patches and implementing robust security monitoring practices to detect and respond to exploitation attempts in real-time.