# CVE-2026-18740 — IBM Security Verify Access

> As of 2026-10-10, CVE-2026-18740 is a HIGH-severity vulnerability in IBM Security Verify Access, CVSS v3.1 8.8, EPSS 0.3% (26.8th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-18740, most recently “IBM Verify Access / Verify Identity Access: 22 Flaws Patched Incl. Unauthenticated RCE via Deserialization (CVE-2026-78401, CVE-2026-78406)”.

**Last updated:** 2026-10-10

## What is CVE-2026-18740?

IBM Security Verify Access 10.0 through 10.0.9.2 and IBM Verify Identity Access 11.0 through 11.0.3 could allow a remote authenticated attacker to perform unauthorized actions due to argument injection.

The record classifies CVE-2026-18740 under weakness class [CWE-88](https://intel.threadlinqs.com/cwe/CWE-88). 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. 4 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 4 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 8.8 — HIGH (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **EPSS (FIRST):** 0.3% probability of exploitation in the next 30 days, higher than 26.8% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 5.5/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-10-08, last modified 2026-10-10

## Is CVE-2026-18740 being exploited?

It currently carries a trending score of 41 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [IBM](https://intel.threadlinqs.com/vendors/ibm): Security Verify Access, Verify Identity Access, Security Verify Access Container, Verify Identity Access Container

## How to fix CVE-2026-18740

No vendor patch reference has been recorded for CVE-2026-18740 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-2026-18740

1 tracked threat in the Threadlinqs corpus references CVE-2026-18740, either in the campaign’s CVE list or as an indicator on the campaign record.

- [IBM Verify Access / Verify Identity Access: 22 Flaws Patched Incl. Unauthenticated RCE via Deserialization (CVE-2026-78401, CVE-2026-78406)](https://intel.threadlinqs.com/threat/TL-2026-3352) — CRITICAL · 2026-10-12

## Sources

Enriched from CVE.org, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-10-12.

**Vendor advisory and patch**

- [ibm.com — vendor advisory](https://www.ibm.com/support/pages/node/7291628)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-18740
Full detection coverage and IOCs for threats exploiting CVE-2026-18740 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp