CVE record · CVE-2024-21591

Junos OS: SRX Series and EX Series: Security Vulnerability in J-web allows a preAuth Remote Code Execution

CVSS 9.8 CriticalCriticalEPSS 0.18 · 97th percentile

Critical, because:

CVSS score 9.8: 9.0 or more.
CVSS score 9.8 (7.0 or more) and EPSS 0.18 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

Published by the CVE Program (CNA: juniper) at 12 Jan 2024, 00:52 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-S7 semver affected 21.3 to before 21.3R3-S5 semver affected 21.4 to before 21.4R3-S5 semver affected 22.1 to before 22.1R3-S4 semver affected 22.2 to before 22.2R3-S3 semver affected 22.3 to before 22.3R3-S2 semver affected 22.4 to before 22.4R2-S2, 22.4R3 semver Other versions: unaffected

Identifiers: CVE-2024-21591
CNA: juniper
Weakness (CWE): CWE-787
Tags: Juniper Networks Junos OS
Memory corruption
Published: 12 Jan 2024
Updated: 25 Oct 2024

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
9.8	Critical	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CNA (juniper)

CISA KEV Not listed.
EPSS 0.18, the 97th percentile, on 6 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/JSA75729 vendor-advisory
www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N technical-description
curesec.com/blog/article/CVE-2024-21591_Juniper_Remote_Code_Exec.html third-party-advisory

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.