---
id: "CVE-2026-66987"
page: "https://infrastack.ai/live/CVE-2026-66987"
kind: "vulnerability"
aliases: ["CVE-2026-66987"]
title: "HCL AION: weak account lockout lets attackers brute-force user passwords"
severity: "medium"
cvss: 5.3
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["hcl-aion", "other"]
not_affected_if: []
published_at: "2026-11-06T16:18:58+00:00"
first_seen_at: "2026-11-06T16:42:42+00:00"
updated_at: "2026-11-06T16:44:44+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-66987", "first_seen_at": "2026-11-06T16:42:42+00:00"}]
exploit_sources: []
---

# HCL AION: weak account lockout lets attackers brute-force user passwords

Link for people: https://infrastack.ai/live/CVE-2026-66987 (this .md is for agents)

HCL AION's account lockout does not sufficiently limit repeated failed logins. An attacker can make many password guesses against a user account and may take it over.

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

## Timeline

- 2026-11-06T16:42:42+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-66987

## From the sources

HCL AION is affected by a vulnerability where the account lockout mechanism did not sufficiently restrict repeated failed login attempts, allowing an attacker to make a large number of password guesses against a user account. This may increase the risk of account compromise through brute-force attacks, potentially resulting in unintended behavior or security impact under certain conditions.

---

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