---
id: "CVE-2026-105671"
page: "https://infrastack.ai/live/CVE-2026-105671"
kind: "vulnerability"
aliases: ["CVE-2026-105671"]
title: "Zenitel Connect login reveals which usernames exist"
severity: "medium"
cvss: 6.9
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["other", "zenitel-connect"]
not_affected_if: ["version-1.11.0-or-later"]
published_at: "2026-11-13T16:17:23+00:00"
first_seen_at: "2026-11-13T16:47:32+00:00"
updated_at: "2026-11-13T16:48:46+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-105671", "first_seen_at": "2026-11-13T16:47:32+00:00"}]
exploit_sources: []
---

# Zenitel Connect login reveals which usernames exist

Link for people: https://infrastack.ai/live/CVE-2026-105671 (this .md is for agents)

The login page in Zenitel Connect before 1.11.0 returns different error messages for existing and non-existing usernames. An remote attacker can use crafted login requests to learn which accounts are valid, which helps them target password guessing.

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

## How to check

- Check the installed Zenitel Connect version against the range before `1.11.0`

## Fix

- Upgrade Zenitel Connect to `1.11.0` or later

## Timeline

- 2026-11-13T16:47:32+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-105671

## From the sources

The login flow in Zenitel Connect before 1.11.0 returns different error responses depending on whether a submitted username exists, which allows remote attackers to enumerate valid user accounts via crafted login requests.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_