CVE-2021-21296

Name: CVE-2021-21296
Creator: NVD / NIST
Published: 2021-02-10T20:15:15.353+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 2.7/10EPSS 1.94%

Last modified Jun 17, 2026

CVE-2021-21296 is a low-severity vulnerability rated 2.7/10 on the CVSS scale. Fleet is an open source osquery manager. In Fleet before version 3.7.0 a malicious actor with a valid node key can send a badly formatted request that causes the Fleet server to exit, resulting in denial of service. EPSS estimates a 1.94% chance of exploitation in the next 30 days.

Description

Fleet is an open source osquery manager. In Fleet before version 3.7.0 a malicious actor with a valid node key can send a badly formatted request that causes the Fleet server to exit, resulting in denial of service. This is possible only while a live query is currently ongoing. We believe the impact of this vulnerability to be low given the requirement that the actor has a valid node key. There is no information disclosure, privilege escalation, or code execution. The issue is fixed in Fleet 3.7.0.

Metrics

CVSS 3.1

2.7/10

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

EPSS Probability

1.94%

77.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-400

Affected Software

Vendor	Product	Versions
Fleetdm	Fleet	< 3.7.0

References

https://github.com/fleetdm/fleet/commit/f68f4238e83b45b2164e4ed05df14af0f06eaf40Patch, Third Party Advisory
https://github.com/fleetdm/fleet/security/advisories/GHSA-xwh8-9p3f-3x45Third Party Advisory
https://www.npmjs.com/package/fleetctlProduct, Third Party Advisory
https://github.com/fleetdm/fleet/commit/f68f4238e83b45b2164e4ed05df14af0f06eaf40Patch, Third Party Advisory
https://github.com/fleetdm/fleet/security/advisories/GHSA-xwh8-9p3f-3x45Third Party Advisory
https://www.npmjs.com/package/fleetctlProduct, Third Party Advisory

Timeline

Published: Feb 10, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-21296?

How severe is CVE-2021-21296?

CVE-2021-21296 has a CVSS score of 2.7/10 (LOW severity). The EPSS model estimates a 1.94% probability of exploitation in the next 30 days.

How do I fix CVE-2021-21296?

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-2021-21296?

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

Scan your code now

Source: NVD / NIST