CVE-2024-39534
MEDIUMDescription
An Incorrect Comparison vulnerability in the local address verification API of Juniper Networks Junos OS Evolved allows an unauthenticated network-adjacent attacker to create sessions or send traffic to the device using the network and broadcast address of the subnet assigned to an interface. This is unintended and unexpected behavior and can allow an attacker to bypass certain compensating controls, such as stateless firewall filters. This issue affects Junos OS Evolved: * All versions before 21.4R3-S8-EVO, * 22.2-EVO before 22.2R3-S4-EVO, * 22.3-EVO before 22.3R3-S4-EVO, * 22.4-EVO before 22.4R3-S3-EVO, * 23.2-EVO before 23.2R2-S1-EVO, * 23.4-EVO before 23.4R1-S2-EVO, 23.4R2-EVO.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Exploit Intelligence
Moderate risk: more likely to be exploited than 48% of all known CVEs.
References
Related Vulnerabilities
Other CWE-697 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2024-5217 | Critical | 9.8 | 100% | KEV | - |
| CVE-2020-5849 | High | 7.5 | 93% | KEV | - |
| CVE-2020-8864 | High | 8.8 | 80% | - | - |
| CVE-2025-3102 | High | 8.1 | 76% | - | - |
| CVE-2023-32571 | Critical | 9.8 | 35% | - | - |
| CVE-2020-8862 | High | 8.8 | 13% | - | - |
Common questions
How do I fix CVE-2024-39534?
Upgrade junos os evolved to 21.4 or later.
Is CVE-2024-39534 being actively exploited?
Not that we know of. CVE-2024-39534 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.66% is the estimated probability that it will be exploited in the next 30 days. That is higher than 48% of all scored CVEs.
How severe is CVE-2024-39534?
CVE-2024-39534 has a CVSS v3 base score of 5.4, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2024-39534 affect?
Published advisories record a fix for junos os evolved (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
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Markdown
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-01-23.