HIGH
CVE-2021-41593
CWE-770Published: October 4, 2021· Updated: Jun 17, 2026
8.6
CVSS v3.1
Official Description
Lightning Labs lnd before 0.13.3-beta allows loss of funds because of dust HTLC exposure.
Technical Analysis
CVE-2021-41593 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 8.6.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityHigh
AvailabilityLow
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
Affected Vendors & Products
lightning_network_daemon_project1 product(s)
lightning network daemon
Source: NVD CPE · 9 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (12)
→
https://bitcoinmagazine.com/technical/good-griefing-a-lingering-vulnerability-on-lightning-network-that-still-needs-fixingPress/Media Coverage · Third Party Advisory
→
https://github.com/lightningnetwork/lnd/blob/master/docs/release-notes/release-notes-0.13.3.mdRelease Notes · Third Party Advisory
→
https://github.com/lightningnetwork/lnd/releases/tag/v0.13.3-betaThird Party Advisory
→
https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-May/002714.htmlMailing List · Vendor Advisory
→
https://lists.linuxfoundation.org/pipermail/lightning-dev/2021-October/003257.htmlMailing List · Vendor Advisory
→
https://lists.linuxfoundation.org/pipermail/lightning-dev/2021-October/003264.htmlExploit · Mailing List · Vendor Advisory
→
https://bitcoinmagazine.com/technical/good-griefing-a-lingering-vulnerability-on-lightning-network-that-still-needs-fixingPress/Media Coverage · Third Party Advisory
→
https://github.com/lightningnetwork/lnd/blob/master/docs/release-notes/release-notes-0.13.3.mdRelease Notes · Third Party Advisory
→
https://github.com/lightningnetwork/lnd/releases/tag/v0.13.3-betaThird Party Advisory
→
https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-May/002714.htmlMailing List · Vendor Advisory
→
https://lists.linuxfoundation.org/pipermail/lightning-dev/2021-October/003257.htmlMailing List · Vendor Advisory
→
https://lists.linuxfoundation.org/pipermail/lightning-dev/2021-October/003264.htmlExploit · Mailing List · Vendor Advisory
Quick Facts
CVE IDCVE-2021-41593
CVSS Score8.6 / 10
SeverityHIGH
WeaknessCWE-770
CISA KEVNo
Affected1 vendor(s)
PublishedOct 4, 2021
Related CVEs (CWE-770)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-41593 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.