CVE-2026-82340 in Guardium Data Protection
Summary
by MITRE • 09/18/2026
IBM Guardium Data Protection 12.2 is vulnerable to unauthenticated insecure deserialization and attacker-controlled reflective method dispatch in the Change Audit System (CAS) listener. A network attacker able to reach TCP port 16017 may submit crafted serialized messages and potentially cause unintended code execution in the Guardium appliance.
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Analysis
by VulDB Data Team • 09/18/2026
The vulnerability identified in IBM Guardium Data Protection version 12.2 represents a critical security flaw within its Change Audit System, specifically affecting the listener component operating on TCP port 16017. This weakness is categorized as an insecure deserialization issue combined with attacker-controlled reflective method dispatch. Insecure deserialization occurs when untrusted data is used to abuse the logic of application frameworks, potentially resulting in remote code execution, denial of service, or privilege escalation. The specific mechanism here involves the system accepting serialized objects from network sources without sufficient validation or sanitization before processing them through reflection APIs. This allows an attacker who can reach the specified port to inject maliciously crafted serialized payloads that exploit these reflective capabilities.
From a technical perspective, Java-based applications often use serialization to convert complex object states into byte streams for storage or transmission. When deserializing this data, the application reconstructs objects in memory. If the system lacks strict allow-listing of trusted classes during this process, an attacker can supply serialized forms of arbitrary classes that are available on the classpath but not intended for external input processing. By leveraging reflective method dispatch, the vulnerability enables the execution of methods associated with these maliciously instantiated objects. This bypasses standard security controls because the code path is determined dynamically at runtime based on the content of the deserialized payload rather than static source code analysis. The presence of this flaw in a network-accessible service means that any entity capable of establishing a TCP connection to port 16017 can attempt exploitation without requiring prior authentication credentials.
The operational impact of this vulnerability is severe, primarily due to its potential for remote code execution. An attacker who successfully exploits this flaw could execute arbitrary commands on the underlying operating system hosting the Guardium appliance with the privileges granted to the application process. This effectively compromises the integrity and confidentiality of the entire data protection infrastructure managed by IBM Guardium. Since Guardium is responsible for monitoring, detecting, and protecting sensitive data across an organization's database environment, a compromise at this level could lead to unauthorized access to critical databases, exfiltration of sensitive information such as personally identifiable information or financial records, and potential lateral movement within the network. The lack of authentication requirement further amplifies the risk, making it accessible to any external threat actor with basic networking capabilities rather than just insider threats or compromised accounts.
This vulnerability aligns closely with Common Weakness Enumeration (CWE) identifiers such as CWE-502 Deserialization of Untrusted Data and CWE-470 Use of Externally-Controlled Input to Select Classes or Code. In the context of the MITRE ATT&CK framework, this exploit technique maps to T1608 Injection, specifically leveraging deserialization mechanisms for code execution, which is a common tactic in advanced persistent threat campaigns targeting enterprise infrastructure. The exploitation path typically involves crafting a serialized payload that includes gadget chains—sequences of method calls on existing classes—that perform malicious actions such as spawning shell processes or reading sensitive files.
Mitigation strategies must prioritize immediate remediation through vendor-provided patches if available, ensuring the system is updated to version 12.2 with all subsequent security fixes applied. In environments where patching cannot be implemented immediately, network-level controls should be enforced to restrict access to TCP port 16017 exclusively from trusted management subnets or specific administrative IP addresses using firewall rules or Access Control Lists. Additionally, implementing strict input validation and ensuring that deserialization processes utilize allow-lists of permitted classes can mitigate the risk in similar architectures. Security monitoring solutions should also be configured to detect anomalous network traffic patterns associated with large serialized data transfers on this port, providing an additional layer of defense against exploitation attempts.