What is CVE-2024-39548?

CVE-2024-39548 is a high-severity vulnerability in Juniper Junos OS Evolved, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2024-07-11.

How severe is CVE-2024-39548?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2024-39548 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Resource exhaustion in Juniper Junos OS Evolved

CVE-2024-39548

An Uncontrolled Resource Consumption vulnerability in the aftmand process of Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to consume memory resources, resulting in a Denial of Service (DoS) condition. The processes do not recover on their own and must be manually restarted. This issue affects both IPv4 and IPv6. Changes in memory usage can be monitored using the following CLI command: user@device> show system memory node <fpc slot> | grep evo-aftmann This issue affects Junos OS Evolved: * All versions before 21.2R3-S8-EVO, * 21.3 versions before 21.3R3-S5-EVO, * 21.4 versions before 21.4R3-S5-EVO, * 22.1 versions before 22.1R3-S4-EVO, * 22.2 versions before 22.2R3-S4-EVO, * 22.3 versions before 22.3R3-S3-EVO, * 22.4 versions before 22.4R2-S2-EVO, 22.4R3-EVO, * 23.2 versions before 23.2R1-S1-EVO, 23.2R2-EVO.

Vulnerability class: DoS (Denial of Service)

Published 2024-07-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.005 (39.9th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 39.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Juniper Junos OS Evolved — versions 21.2, 21.3, 21.4
Juniper Networks Junos OS Evolved — versions 0, 21.3, 21.4

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

supportportal.juniper.net/JSA83010 (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2024-39548?: CVE-2024-39548 is a high-severity vulnerability in Juniper Junos OS Evolved, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2024-07-11.
How severe is CVE-2024-39548?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2024-39548 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.