CVE record · CVE-2024-21597

Junos OS: MX Series: In an AF scenario traffic can bypass configured lo0 firewall filters

CVSS 5.3 MediumEPSS 0.0037 · 31st percentile

Published by the CVE Program (CNA: juniper) at 12 Jan 2024, 00:53 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Juniper Networks	Junos OS	affected before 20.4R3-S9 semver affected 21.2 to before 21.2R3-S3 semver affected 21.4 to before 21.4R3-S5 semver affected 22.1 to before 22.1R3 semver affected 22.2 to before 22.2R3 semver affected 22.3 to before 22.3R2 semver Other versions: unaffected

Identifiers: CVE-2024-21597
CNA: juniper
Weakness (CWE): CWE-668
Tags: Juniper Networks Junos OS
Information disclosure
Published: 12 Jan 2024
Updated: 3 Jun 2025

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
5.3	Medium	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N	CNA (juniper)

CISA KEV Not listed.
EPSS 0.0037, the 31st percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 12 Jan 2024. New records show when each source confirmed them.

Sources

References from the CNA

supportportal.juniper.net/JSA75738 vendor-advisory
www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N technical-description

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.