# CVE-2026-86093 — IBM Db2

> As of 2026-09-12, CVE-2026-86093 is a HIGH-severity vulnerability in IBM Db2, CVSS v3.1 7.5, EPSS 0.4% (39.6th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-86093 as of 2026-09-12; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-09-12

## What is CVE-2026-86093?

IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.5 could allow an attacker with the ability to control or impersonate a DRDA server endpoint to execute arbitrary commands on Db2 clients due to a stack-based buffer overflow that improperly copies user-controlled data into a fixed-size stack buffer without bounds checking.

The record classifies CVE-2026-86093 under weakness class [CWE-121](https://intel.threadlinqs.com/cwe/CWE-121). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 25 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 7.5 — HIGH (`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **EPSS (FIRST):** 0.4% probability of exploitation in the next 30 days, higher than 39.6% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 5.3/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-10, last modified 2026-09-12

## Is CVE-2026-86093 being exploited?

It currently carries a trending score of 39 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [IBM](https://intel.threadlinqs.com/vendors/ibm): Db2

## How to fix CVE-2026-86093

No vendor patch reference has been recorded for CVE-2026-86093 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-86093

No threat campaign in the Threadlinqs corpus currently references CVE-2026-86093, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, FIRST EPSS. Last verified by Threadlinqs on 2026-09-13.

**Vendor advisory and patch**

- [ibm.com — vendor advisory](https://www.ibm.com/support/pages/node/7286993)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-86093
Full detection coverage and IOCs for threats exploiting CVE-2026-86093 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp