---
id: "CVE-2026-86391"
kind: "vulnerability"
aliases: ["CVE-2026-86391"]
title: "Dell PowerProtect Data Domain Management Center: authentication bypass allows denial of service"
severity: "medium"
cvss: 6.4
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["backup-appliance", "data-domain", "dell", "infrastructure", "powerprotect"]
not_affected_if: ["unaffected-version"]
published_at: "2026-10-28T10:17:10+00:00"
first_seen_at: "2026-10-28T10:32:15+00:00"
updated_at: "2026-10-28T10:34:31+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-86391", "first_seen_at": "2026-10-28T10:32:15+00:00"}]
---

# Dell PowerProtect Data Domain Management Center: authentication bypass allows denial of service

Dell PowerProtect Data Domain Management Center has an authentication bypass by spoofing in several release lines. A low-privileged remote attacker can potentially exploit it to cause a denial of service.

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

## How to check

- Check the installed Data Domain Management Center version in the appliance UI or CLI against the affected ranges: Feature Release 7.7.1.0 through 8.8, LTS2024 7.13.1.0 through 7.13.1.80, LTS2025 8.3.1.0 through 8.3.1.40, LTS2026 8.6.1.0 through 8.6.1.20.

## Fix

- Move to a fixed release from Dell's advisory for CVE-2026-86391; the sources do not name the fixed version numbers.

## Timeline

- 2026-10-28T10:32:15+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-86391

## From the sources

Dell PowerProtect Data Domain Management Center, Feature Release versions 7.7.1.0 through 8.8, LTS2024 release versions 7.13.1.0 through 7.13.1.80, LTS2025 release versions 8.3.1.0 through 8.3.1.40, LTS2026 release versions 8.6.1.0 through 8.6.1.20, contain an Authentication Bypass by Spoofing vulnerability. A low privileged attacker with remote access could potentially exploit this vulnerability, leading to Denial of service.

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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_