External risk intelligence

IBM Guardium Data Protection Heap-Based Buffer Overflow

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2026-82335

IBM Guardium Data Protection is a database security and monitoring platform designed for internal deployment within corporate networks to protect sensitive data stores. While the vulnerability exists in the MongoDB protocol parser, this service typically operates behind internal firewalls and is not intended to be exposed directly to the public internet in common deployment patterns.

Memory Corruption

Ibm Guardium Data Protection

12.012.112.2

Halo Surface Signal: 2 out of 5 — less likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A critical vulnerability has been identified in IBM Guardium Data Protection, a system designed to secure sensitive data. The issue involves a memory corruption flaw that could allow unauthorized execution or denial of service. The primary concern is to confirm if our organization utilizes the affected technology and assess any potential exposure.

Memory corruption flaw in data protection system.
Potentially allows code execution or denial of service.
Confirm relevance and assess exposure to this risk.

Attack Path

How an attacker could exploit the issue

An attacker could target the MongoDB protocol parser within IBM Guardium Data Protection from anywhere on the network without needing any prior access. By sending a specially crafted MongoDB username that is excessively long, the attacker can corrupt the program's memory. This corruption could allow for unauthorized code execution or disrupt the service, leading to a denial of service.

No authentication or privileges required.
Specially crafted username triggers overflow.
Potential for code execution and DoS.

Live Threat

Current exploitation, exposure, and threat context

A remote attacker could exploit a heap-based buffer overflow in the MongoDB protocol parser when processing a specially crafted, excessively long SCRAM username. This could lead to memory corruption, potentially affecting service availability and the integrity of operations managed by IBM Guardium Data Protection.

Affected system: IBM Guardium Data Protection service.
Exposure: Network access with a crafted SCRAM username.
Consequence: Service disruption or code execution.

Operational Fix

Recommended remediation, mitigation, and detection steps

Security and infrastructure teams managing IBM Guardium Data Protection deployments should take immediate action to triage this critical vulnerability. The first step involves identifying all instances of the affected technology, determining their exposure and business criticality, and then engaging the appropriate asset owners to plan remediation. This proactive approach will ensure that the highest-risk systems are addressed first.

Platform and infrastructure teams own the issue.
Verify Guardium Data Protection asset exposure.
Plan and coordinate vendor-supported remediation.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

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Frequently asked questions

What is IBM Guardium Data Protection?

IBM Guardium Data Protection is a specialized software platform used by organizations to monitor, audit, and secure sensitive data stored in databases. It acts as a security layer that helps manage compliance and prevent unauthorized access to an organization's critical information assets.

How does this heap-based buffer overflow work in CVE-2026-82335?

This vulnerability, classified as CWE-119 and CWE-787, occurs when the software's MongoDB protocol parser receives more data than its memory buffer can hold. Because the parser does not properly validate the length of a SCRAM username, an attacker can overwrite adjacent memory, potentially forcing the system to execute unauthorized code or crash.

Can any MongoDB traffic trigger this vulnerability?

No. The flaw specifically requires an attacker to send a specially crafted, excessively long SCRAM username. Standard or properly formatted MongoDB authentication requests that comply with expected length limits will not trigger this memory corruption issue.

Do I need to worry if my instance is internal?

According to Halo Surface Signal, this software is typically deployed within internal corporate networks to monitor databases. Because the system is generally not intended to be exposed to the public internet, the practical risk for many installations is lower than for internet-facing services, though it remains a critical internal concern.

When should I start responding to this CVE?

You should begin by immediately locating all running instances of IBM Guardium Data Protection versions 12.0, 12.1, and 12.2. Once identified, evaluate their network accessibility and business criticality to prioritize which systems need vendor-supplied updates first.

References

www.ibm.com/support/pages/node/7291674

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.