🛡️ CVE-2024-39540
🟠 CVSS 7.5 — High ✅ No Known Exploit CWE-754 NVD
7.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on SRX Series, and MX Series with SPC3 allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS). When an affected device receives specific valid TCP traffic, the pfe crashes and restarts leading to a momentary but complete service outage. This issue affects Junos OS: 21.2 releases from 21.2R3-S5 before 21.2R3-S6. This issue does not affect earlier or later releases.

Details

Severity HIGH
CVSS Score 7.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE CWE-754
Public Exploit ✅ No
Source NVD
Published 2024-07-11
Updated 2026-06-02
Modified 2025-04-11
Fix URL N/A

Affected Packages

Software From version Fixed in
junos — —

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