---
id: "CVE-2026-107674"
kind: "vulnerability"
aliases: ["CVE-2026-107674"]
title: "IBM i: Digital Certificate Manager flaw can block or downgrade secure connections"
severity: "medium"
cvss: 5.1
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: [{"name": "ibm i", "fixed": [], "affected": "= 7.3", "ecosystem": "vendor"}, {"name": "ibm i", "fixed": [], "affected": "= 7.4", "ecosystem": "vendor"}, {"name": "ibm i", "fixed": [], "affected": "= 7.5", "ecosystem": "vendor"}, {"name": "ibm i", "fixed": [], "affected": "= 7.6", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["digital-certificate-manager", "ibm-i", "infrastructure", "system-tls"]
not_affected_if: []
published_at: "2026-10-16T19:17:02+00:00"
first_seen_at: "2026-10-23T21:57:14+00:00"
updated_at: "2026-10-25T04:29:13+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-107674", "first_seen_at": "2026-10-23T21:57:14+00:00"}]
---

# IBM i: Digital Certificate Manager flaw can block or downgrade secure connections

IBM i versions 7.3 through 7.6 have a flaw in Digital Certificate Manager for System TLS that affects applications creating secure network connections. An attacker can deny service by stopping a service from starting, or force applications to fall back to non-secure connections.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:ibm i affected = 7.3 fixed ?
- vendor:ibm i affected = 7.4 fixed ?
- vendor:ibm i affected = 7.5 fixed ?
- vendor:ibm i affected = 7.6 fixed ?

## How to check

- unknown

## Fix

- unknown

## Timeline

- 2026-10-23T21:57:14+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-107674

## From the sources

IBM i 7.3, 7.4, 7.5, and 7.6 is vulnerable to a denial of service to Digital Certificate Manager (DCM) for System TLS using applications attempting to create secure network connections. A bad actor could use this to prevent a service from starting or cause it to fallback to non-secure connections.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_