Remote RCE in a widely deployed enterprise data protection appliance (IBM Guardium) can compromise security infrastructure and sensitive data across organizations.
CVE-2026-84198
Remote buffer overflow in IBM Guardium allows arbitrary code execution.
Is CVE-2026-84198 being exploited?
Not confirmed. CVE-2026-84198 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.37% probability of exploitation in the next 30 days.
How severe is CVE-2026-84198?
CVE-2026-84198 is rated High with a CVSS score of 8.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-84198?
Not known from our data. No patch reference has been recorded for CVE-2026-84198, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-84198 affect?
CVE-2026-84198 affects IBM Guardium Data Protection 12.0, IBM Guardium Data Protection 12.1, IBM Guardium Data Protection 12.2. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-84198?
Apply vendor fixes when available; isolate appliances and restrict access to Guardium management interfaces.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution via buffer overflow in Guardium, allowing attackers to run arbitrary code on the appliance, access logs/data and pivot inside networks.
Immediate action required
- affected12.0
- affected12.1
- affected12.2
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.