What is CVE-2026-84058?

CVE-2026-84058 is a high-severity vulnerability in IBM Guardium Data Protection, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.1/10. Published 2026-10-08.

How severe is CVE-2026-84058?

High severity. CVSS v3 base score is 8.1 out of 10.

Buffer overflow in IBM Guardium Data Protection

CVE-2026-84058

IBM Guardium Data Protection 12.0, 12.1, and 12.2 is vulnerable to a buffer overrun in the TDS (Microsoft SQL Server) PRELOGIN packet decoder. A remote attacker who can send a specially crafted TDS PRELOGIN packet to a network monitored by an IBM Guardium Collector may cause a denial of service or potentially execute arbitrary code on the Collector appliance.

Vulnerability class: Buffer Overflow

Published 2026-10-08 · last modified 2026-10-09.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

IBM Guardium Data Protection — versions 12.0, 12.1, 12.2

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

www.ibm.com/support/pages/node/7291674 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-84058?: CVE-2026-84058 is a high-severity vulnerability in IBM Guardium Data Protection, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.1/10. Published 2026-10-08.
How severe is CVE-2026-84058?: High severity. CVSS v3 base score is 8.1 out of 10.