CVE-2026-83548 in SMA1000
Summary
by MITRE • 09/02/2026
A Pre-authentication SSRF vulnerability exists in the SMA1000 Appliance Work Place interface due to an unintended alternate access path. A remote unauthenticated attacker could potentially exploit this vulnerability to gain unauthorized access to sensitive functionality and perform unauthorized operations.
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Analysis
by VulDB Data Team • 09/02/2026
The identified security flaw represents a critical Server-Side Request Forgery (SSRF) vulnerability within the SMA1000 Appliance Work Place interface, specifically categorized under CWE-918 due to its nature of allowing an attacker to manipulate server-side requests. This issue stems from an unintended alternate access path that bypasses standard authentication mechanisms, creating a pre-authentication entry point for remote exploitation. The core technical flaw lies in the application's failure to properly validate or restrict URLs provided by unauthenticated users before processing them on the backend. By leveraging this misconfiguration, a malicious actor can craft specific HTTP requests that force the vulnerable server to initiate connections to internal resources or external systems under the context of the running service account. This lack of input validation and access control enforcement allows for significant lateral movement within the network infrastructure, as the attacker is not required to possess valid credentials to trigger these actions.
From an operational perspective, the impact of this vulnerability extends beyond simple data exfiltration. An unauthenticated remote attacker can exploit this alternate path to probe internal networks, identify live hosts, and access sensitive administrative interfaces that are typically isolated from public-facing services. This capability aligns with ATT&CK technique T1598, specifically Phishing for Intranet Credentials or more accurately in this context, Active Scanning via SSRF which facilitates reconnaissance of the internal network topology. The ability to perform unauthorized operations without authentication significantly lowers the barrier for entry, enabling attackers to conduct further attacks such as credential harvesting from internal services, accessing configuration files containing secrets, or potentially chaining this flaw with other vulnerabilities to achieve remote code execution on the underlying operating system.
Mitigation strategies must focus on immediate remediation of the access control logic and network segmentation improvements. The primary corrective action involves hardening the SMA1000 Appliance Work Place interface by ensuring that all administrative endpoints require strict authentication before any processing occurs, effectively closing the unintended alternate access path. Additionally, implementing robust input validation to sanitize URLs and restrict allowed protocols is essential to prevent SSRF payloads from being processed. Network-level controls should also be reviewed; deploying web application firewalls with SSRF detection rules can help block malicious requests at the perimeter. Furthermore, restricting outbound connections from the appliance to only necessary internal services reduces the blast radius if an exploitation attempt occurs. Regular security audits and penetration testing focusing on authentication bypasses are recommended to ensure that no similar alternate paths exist within other components of the SMA1000 ecosystem.