# CVE-2026-84198: IBM Guardium Data Protection buffer overflow in Sniffer

Source: https://junglewise.ai/threats/cve-2026-84198-ibm-guardium-data-protection-12-0-12-1-and-12-2-could-allow-a  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-08. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-84198 · Severity: high · CVSS 8.1 · Published 2026-10-08

IBM Guardium Data Protection is a database security monitoring appliance that protects sensitive data across enterprise networks. A remote attacker can execute arbitrary code on the monitored systems by sending specially crafted network packets, potentially leading to complete compromise of the protected databases and data breaches.

Technologies: [IBM Guardium Data Protection](https://junglewise.ai/threats/technologies/guardium-data-protection). Vendors: [IBM](https://junglewise.ai/threats/vendors/ibm).

## Quick answers

**Is CVE-2026-84198 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-84198 being exploited in the wild.

**How severe is CVE-2026-84198?** High severity, with a CVSS score of 8.1, published 8 October 2026.

**Which products and versions are affected?** IBM Guardium Data Protection 12.0, 12.1, 12.2.

**Is there a fix for CVE-2026-84198?** Yes: fixed in IBM Guardium Data Protection Sniffer patch (SqlGuard_12.0p4018_SnifferUpdate or later). Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-84198 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-84198?** Check whether you run IBM Guardium Data Protection at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in IBM Guardium Data Protection Sniffer patch (SqlGuard_12.0p4018_SnifferUpdate or later)

## Technical details

CVE-2026-84198 is a classic buffer overflow (CWE-120) in the Sniffer component's network packet parsing. A remote attacker without authentication can send a malicious packet with oversized input to trigger memory corruption and execute arbitrary code; the attack requires no user interaction but has high complexity (AC:H). The advisory addresses multiple related buffer overflow vulnerabilities in versions 12.0–12.2 with a patch to the Sniffer component.

## Affected products

- IBM Guardium Data Protection 12.0, 12.1, 12.2

## Timeline

- 2026-10-08: disclosed

## References

- [https://www.ibm.com/support/pages/node/7291674](https://www.ibm.com/support/pages/node/7291674)

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