CVE-2021-28091

Name: CVE-2021-28091
Creator: NVD / NIST
Published: 2021-06-04T15:15:07.607+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.32%

Last modified Jun 17, 2026

CVE-2021-28091 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Lasso all versions prior to 2.7.0 has improper verification of a cryptographic signature.. EPSS estimates a 1.32% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.32%

67.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-347

Affected Software

Vendor	Product	Versions
Entrouvert	Lasso	< 2.7.0
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0
Fedoraproject	Fedora	33
Fedoraproject	Fedora	34

References

http://listes.entrouvert.com/arc/lasso/Product
https://git.entrouvert.org/lasso.git/commit/?id=076a37d7f0eb74001127481da2d355683693cde9Patch, Vendor Advisory
https://git.entrouvert.org/lasso.git/tree/NEWS?id=v2.7.0Release Notes, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00013.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SI4YAQF4VEV2KHQ6OXXZL7CJK7IZQ3EG/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YSVWOHBBWLI2RB5C6TXINFEJRT4YSD3D/
https://www.debian.org/security/2021/dsa-4926Third Party Advisory
http://listes.entrouvert.com/arc/lasso/Product
https://git.entrouvert.org/lasso.git/commit/?id=076a37d7f0eb74001127481da2d355683693cde9Patch, Vendor Advisory
https://git.entrouvert.org/lasso.git/tree/NEWS?id=v2.7.0Release Notes, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00013.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SI4YAQF4VEV2KHQ6OXXZL7CJK7IZQ3EG/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YSVWOHBBWLI2RB5C6TXINFEJRT4YSD3D/
https://www.debian.org/security/2021/dsa-4926Third Party Advisory

Timeline

Published: Jun 4, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-28091?

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

How severe is CVE-2021-28091?

CVE-2021-28091 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.32% probability of exploitation in the next 30 days.

How do I fix CVE-2021-28091?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-28091?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST