CVE-2021-41592
Blockstream c-lightning through 0.10.1 allows loss of funds because of dust HTLC exposure.
Blockstream c-lightning through 0.10.1 allows loss of funds because of dust HTLC exposure.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
Blockstream c-lightning through 0.10.1 allows loss of funds because of dust HTLC exposure.
- Record
CVE-2021-41592- CVSS 3.1
- 9.4 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-770
- Updated
- 2026-11-02
CVE List No score
Blockstream c-lightning through 0.10.1 allows loss of funds because of dust HTLC exposure.
- Record
CVE-2021-41592- Updated
- 2026-11-02
EUVDEUVD-2021-28606 No score
Blockstream c-lightning through 0.10.1 allows loss of funds because of dust HTLC exposure.
- Record
EUVD-2021-28606- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-rqmp-32v6-q5qj
Blockstream c-lightning through 0.10.1 allows loss of funds because of dust HTLC exposure.
Blockstream c-lightning through 0.10.1 allows loss of funds because of dust HTLC exposure.
- Record
GHSA-rqmp-32v6-q5qj- CVSS 3.1
- 9.4 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H - Weakness
- CWE-863
- Updated
- 2026-11-02
OSV
Blockstream c-lightning through 0.10.1 allows loss of funds because of dust HTLC exposure.
- Record
CVE-2021-41592- CVSS 3.1
- 9.4 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H - Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-41592 is a critical vulnerability (CVSS 9.4) in Elementsproject C-lightning, published October 4, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.55%, the 75th percentile. No source names a fixed version.
References
lists.linuxfoundation.org/pipermail/lightning-dev/2020-May/002714.html
bitcoinmagazine.com/technical/good-griefing-a-lingering-vulnerability-on-lightning-network-that-still-needs-fixing
github.com/ElementsProject/lightning
nvd.nist.gov/vuln/detail/CVE-2021-41592