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IBM Guardium CVE-2026-82340

| EUVDEUVD-2026-83310 CRITICAL
Code Injection (CWE-94)
2026-09-18 ibm GHSA-mf93-58gc-8fqq
9.8
CVSS 3.1 · Vendor: ibm
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Severity by source

Vendor (ibm) PRIMARY
9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
8.1 HIGH

Unauthenticated network deserialization gives PR:N and C/I/A:H, but reliable RCE via reflective dispatch plus reaching non-standard port 16017 warrants AC:H over the vendor's AC:L.

3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (ibm).

CVSS VectorVendor: ibm

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Sep 18, 2026 - 20:17 vuln.today
CVE Published
Sep 18, 2026 - 19:30 cve.org
CRITICAL 9.8

DescriptionCVE.org

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.

AnalysisAI

Unauthenticated insecure deserialization in the Change Audit System (CAS) listener of IBM Guardium Data Protection 12.2 allows a network attacker who can reach TCP port 16017 to submit crafted serialized messages that are insecurely deserialized and used for attacker-controlled reflective method dispatch, potentially resulting in unintended code execution on the Guardium appliance with high confidentiality, integrity, and availability impact. The vendor-reported base score is 9.8 (AV:N/AC:L/PR:N/UI:N); our independent assessment keeps the unauthenticated, no-user-interaction profile but applies AC:H, because the practical gating factor is whether an attacker has a network path to the non-standard CAS port rather than any product configuration toggle. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Exploit
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Execution
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires network reachability to the Change Audit System (CAS) listener on TCP port 16017 of an IBM Guardium Data Protection 12.2 appliance; the attacker submits crafted serialized messages that are insecurely deserialized and used for attacker-controlled reflective method dispatch. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment This is a genuinely high-priority issue, not a high-CVSS-but-low-risk case. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Apply the IBM vendor patch for Guardium Data Protection 12.2; patch availability is confirmed by IBM and the fix and any required build level should be taken from the vendor advisory at https://www.ibm.com/support/pages/node/7288040 (Patch available per vendor advisory; the exact fixed build identifier is not provided in the source data, so confirm it against the advisory rather than assuming a version). … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, confirm whether IBM Guardium Data Protection 12.2 is deployed and whether TCP port 16017 (CAS listener) is reachable from untrusted networks; if so, immediately restrict access to that port via firewall, security group, or network ACL to only trusted management hosts and review logs for anomalous connections or serialized payloads. …

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CVE-2026-82340 vulnerability details – vuln.today

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