---
id: CVE-2025-34155
title: >-
  Tibbo AggreGate Network Manager < 6.40.05 contains an observable response
  discrepancy in its login functionality
summary: >-
  Tibbo AggreGate Network Manager < 6.40.05 contains an observable response
  discrepancy in its login functionality. Authentication failure messages differ
  based on whether a supplied username exists or not, allowing an
  unauthenticated remo…
severity: none
cwe:
  - CWE-204
published: '2025-10-23'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T11:10:00.250'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-34155'
references:
  - url: 'https://aggregate.digital/downloads.html'
    label: disclosure@vulncheck.com
  - url: 'https://aggregate.digital/products/network-manager.html'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/tibbo-aggregate-network-manager-login-functionality-user-enumeration
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.00526
epssPercentile: 0.42765
ingestedAt: '2026-10-08T11:31:27.560Z'
---

## Overview

Tibbo AggreGate Network Manager < 6.40.05 contains an observable response discrepancy in its login functionality. Authentication failure messages differ based on whether a supplied username exists or not, allowing an unauthenticated remote attacker to infer valid account identifiers. This can facilitate user enumeration and increase the likelihood of targeted brute-force or credential-stuffing attacks.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.