Is CVE-2026-33787 actively exploited?

A proof-of-concept exploit is publicly available for CVE-2026-33787, but active exploitation has not been confirmed.

Can CVE-2026-33787 be exploited remotely?

No. CVE-2026-33787 requires local access to exploit.

What is the CVSS score of CVE-2026-33787?

CVE-2026-33787 has a CVSS score of 5.5 (MEDIUM).

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MEDIUMPOC

CVE-2026-33787

CWE-754Published: April 9, 2026· Updated: Apr 13, 2026

5.5

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:2.1th

Official Description

An Improper Check for Unusual or Exceptional Conditions vulnerability in the chassis control daemon (chassisd) of Juniper Networks Junos OS on SRX1500, SRX4100, SRX4200 and SRX4600 allows a local attacker with low privileges to cause a complete Denial of Service (DoS).

When a specific 'show chassis' CLI command is executed, chassisd crashes and restarts which causes a momentary impact to all traffic until all modules are online again.

This issue affects Junos OS on SRX1500, SRX4100, SRX4200 and SRX4600:

* 23.2 versions before 23.2R2-S6,

* 23.4 versions before 23.4R2-S7

* 24.2 versions before 24.2R2-S2,

* 24.4 versions before 24.4R2,

* 25.2 versions before 25.2R1-S1, 25.2R2.

NVD Source

Technical Analysis

CVE-2026-33787 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.

A proof-of-concept (PoC) exploit exists for CVE-2026-33787. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.