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Vulnerability record · CVE-2021-28091 · published 4 June 2021

CVE-2021-28091: Entrouvert lasso improper verification of cryptographic signature vulnerability

EEntrouvert · Lasso

Lasso all versions prior to 2.7.0 has improper verification of a cryptographic signature.

7.5 CVSS 3.1 High EPSS 1.3% · top 30.2% CWE-347 · Improper verification of cryptographic signature
7.5CVSS 3.1 base score, v2 5.0
1.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
14References
17 Jun 2026Last modified by NVD

Description

Lasso all versions prior to 2.7.0 has improper verification of a cryptographic signature.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://listes.entrouvert.com/arc/lasso/ Product
https://git.entrouvert.org/lasso.git/commit/?id=076a37d7f0eb74001127481da2d355683693cde9 PatchVendor Advisory
https://git.entrouvert.org/lasso.git/tree/NEWS?id=v2.7.0 Release NotesVendor Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00013.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SI4YAQF4VEV2KHQ6OXXZL7C
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YSVWOHBBWLI2RB5C6TXINFE
https://www.debian.org/security/2021/dsa-4926 Third Party Advisory
http://listes.entrouvert.com/arc/lasso/ Product
https://git.entrouvert.org/lasso.git/commit/?id=076a37d7f0eb74001127481da2d355683693cde9 PatchVendor Advisory
https://git.entrouvert.org/lasso.git/tree/NEWS?id=v2.7.0 Release NotesVendor Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00013.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SI4YAQF4VEV2KHQ6OXXZL7C
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YSVWOHBBWLI2RB5C6TXINFE
https://www.debian.org/security/2021/dsa-4926 Third Party Advisory

Track CVE-2021-28091 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

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Source: NIST National Vulnerability Database (record CVE-2021-28091), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.