TI-2021-18322 Aliases CVE-2021-41591 GHSA-r6qw-cx64-86rx

ACINQ Eclair before 0.6.3 allows loss of funds because of dust HTLC exposure.

MEDIUM 44CWE-770Published 2021-10-04 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: Low · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-770.

Summary

ACINQ Eclair before 0.6.3 allows loss of funds because of dust HTLC exposure.

Why it matters now

EPSS 0.01705 77th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:acinq:eclair::::::::	before 0.6.3	Vulnerable	Acinq

cpe:2.3:a:acinq:eclair:*:*:*:*:*:*:*:* Versions before 0.6.3 Vulnerable ·Acinq

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-41591
2026-10-03 Alias added: GHSA-r6qw-cx64-86rx

References

Exploit 1

https://lists.linuxfoundation.org/pipermail/lightning-dev/2021-October/003257.html

Patch 1

https://github.com/ACINQ/eclair/pull/1985

Advisory 1

https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-May/002714.html

Other 1

https://bitcoinmagazine.com/technical/good-griefing-a-lingering-vulnerability-on-lightning-network-that-still-needs-fixing

TI-2019-09739 Eclair through 0.3 allows attackers to trigger loss of funds because of Incorrect Access… CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences