Is CVE-2020-1647 actively exploited?

No active exploitation of CVE-2020-1647 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-1647 be exploited remotely?

Yes. CVE-2020-1647 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2020-1647?

CVE-2020-1647 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2020-1647

CWE-415Published: July 17, 2020· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

On Juniper Networks SRX Series with ICAP (Internet Content Adaptation Protocol) redirect service enabled, a double free vulnerability can lead to a Denial of Service (DoS) or Remote Code Execution (RCE) due to processing of a specific HTTP message. Continued processing of this specific HTTP message may result in an extended Denial of Service (DoS). The offending HTTP message that causes this issue may originate both from the HTTP server or the client. This issue affects Juniper Networks Junos OS on SRX Series: 18.1 versions prior to 18.1R3-S9; 18.2 versions prior to 18.2R3-S3; 18.3 versions prior to 18.3R2-S4, 18.3R3-S1; 18.4 versions prior to 18.4R2-S5, 18.4R3; 19.1 versions prior to 19.1R2; 19.2 versions prior to 19.2R1-S2, 19.2R2; 19.3 versions prior to 19.3R2. This issue does not affect Juniper Networks Junos OS prior to 18.1R1.

NVD Source

Technical Analysis

CVE-2020-1647 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.