Is CVE-2026-57026 actively exploited?

No active exploitation of CVE-2026-57026 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-57026 be exploited remotely?

Yes. CVE-2026-57026 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-57026?

CVE-2026-57026 has a CVSS score of 7.5 (HIGH).

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HIGH

CVE-2026-57026

CWE-1286Published: July 9, 2026· Updated: Jul 14, 2026

7.5

CVSS v3.1

EPSS:0.46%probability of exploitation in 30 daysPercentile:36.9th

Official Description

An Improper Validation of Syntactic Correctness of Input vulnerability in the SIP plugin of Juniper Networks Junos OS on MX Series with SPC3 and SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).If the SIP ALG is enabled on an affected device, the processing of a malformed SIP invite packet will cause a flow processing daemon (flowd) crash and restart. This leads to a complete service outage until the system has automatically recovered.

This issue affects Junos OS on MX Series with SPC3 and SRX Series:

* all versions before 23.2R2-S7,

* 23.4 versions before 23.4R2-S8,

* 24.2 versions before 24.2R2-S5,

* 24.4 versions before 24.4R2-S4,

* 25.2 versions before 25.2R2,

* 25.4 versions before 25.4R1-S2.

NVD Source

Technical Analysis

CVE-2026-57026 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 availability disruption (denial of service), with a CVSS base score of 7.5.