# CVE-2026-84058: IBM Guardium Data Protection buffer overflow in TDS PRELOGIN decoder

Source: https://junglewise.ai/threats/cve-2026-84058-ibm-guardium-data-protection-12-0-12-1-and-12-2-is-vulnerable-to  
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-2026-84058 · Severity: high · CVSS 8.1 · Published 2026-10-08

IBM Guardium Data Protection is a database security monitoring appliance that protects SQL Server and other database environments. A buffer overflow vulnerability in the TDS packet decoder allows a remote attacker to send a specially crafted packet and crash the system or execute arbitrary code on the monitoring collector. This could compromise the entire database security monitoring infrastructure.

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-2026-84058 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-84058 being exploited in the wild.

**How severe is CVE-2026-84058?** 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-2026-84058?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-84058 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-84058?** 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.

## Technical details

A heap-based buffer overrun exists in the Sniffer component's TDS (Tabular Data Stream) PRELOGIN packet decoder when processing specially crafted packets. An unauthenticated remote attacker on the network can trigger this vulnerability by sending a malformed packet, resulting in memory corruption that leads to denial of service or remote code execution on the Collector appliance with no user interaction required.

## 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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