CVE-2026-82772 in ECE1000
Summary
by MITRE • 09/14/2026
Buffer overflow vulnerability exists in Contec EC1000 series. If a remote attacker sends a specially crafted request to the product's web service, an arbitrary program may be executed.
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Analysis
by VulDB Data Team • 09/14/2026
The identified security flaw represents a critical buffer overflow condition within the embedded web server component of the Contec EC1000 series industrial control devices. This vulnerability stems from improper boundary checking during the processing of HTTP requests received by the device's management interface. When an external actor transmits a specifically crafted payload containing oversized or malformed data fields, the application fails to validate the length of the input against the allocated memory buffer size. Consequently, the excess data overwrites adjacent memory locations on the stack or heap, corrupting critical control structures such as return addresses and instruction pointers. This corruption allows an attacker to redirect the execution flow of the vulnerable process away from its intended logic path.
From a technical perspective, this flaw aligns with Common Weakness Enumeration identifier CWE-120, which classifies buffer copies without checking size limits for stack-based overflows. The exploitation mechanism typically involves injecting shellcode or leveraging return-oriented programming techniques to achieve arbitrary code execution on the target system. Since the web service often runs with elevated privileges necessary for device configuration and monitoring, successful exploitation grants the attacker a high-level command prompt within the operating environment of the industrial controller. This capability bypasses standard authentication mechanisms if the vulnerability is triggered before login checks or exploits weak default credentials that are commonly found in such embedded systems.
The operational impact of this vulnerability is severe due to the critical nature of the EC1000 series devices, which serve as gateways and controllers in industrial automation networks. An attacker who successfully executes arbitrary code can compromise the confidentiality, integrity, and availability of connected processes. This may lead to unauthorized manipulation of physical machinery, disruption of production lines, or exfiltration of sensitive operational data. Furthermore, because these devices are often deployed on isolated OT networks that lack robust perimeter defenses like deep packet inspection at every segment, a compromised EC1000 can serve as a pivot point for lateral movement into more critical control systems such as PLCs and SCADA servers. This scenario mirrors attack patterns documented in the MITRE ATT&CK framework under techniques related to initial access via web services and privilege escalation through memory corruption exploits.
Mitigation strategies must address both immediate remediation and long-term architectural improvements. The primary defense is applying vendor-provided firmware updates that patch the buffer overflow by implementing strict input validation and bounds checking routines. If patches are unavailable, network-level controls should be enforced to restrict access to the device's web management interface exclusively from trusted administrative subnets using firewalls or VLAN segmentation. Additionally, disabling unnecessary services such as HTTP if HTTPS is supported can reduce the attack surface. Security monitoring tools should be configured to detect anomalous traffic patterns indicative of buffer overflow attempts, including unusually large POST requests or malformed headers directed at port 80 or other web service ports associated with these devices. Regular vulnerability assessments and penetration testing focused on embedded systems are essential to identify similar weaknesses before they can be exploited in the wild.