Junos OS vulnerability

A Heap-based Buffer Overflow vulnerability in the sdxd service-deployment daemon of Juniper Networks Junos OS and Junos OS Evolved allows a remote unauthenticated attacker who can control or intercept the configured SDX/SRC server connection to execute code as root or cause denial of service via a crafted frame received over the service-deployment TCP connection.

Published 14 Oct 2026Updated 16 Oct 20261 sources
CVSS 9.3

What happened

A Heap-based Buffer Overflow vulnerability in the sdxd service-deployment daemon of Juniper Networks Junos OS and Junos OS Evolved allows a remote unauthenticated attacker who can control or intercept the configured SDX/SRC server connection to execute code as root or cause denial of service via a crafted frame received over the service-deployment TCP connection.

Affected versions

Junos OS: before 23.2R2-S7.7 (custom); 23.4 through before 23.4R2-S8.13 (custom); 24.2 through before 24.2R2-S5.5 (custom); 24.4 through before 24.4R2-S5 (custom); 25.2 through before 25.2R2-S2 (custom); 25.4 through before 25.4R1-S3 (custom); 26.2 through before 26.2R1-S2 (custom); before 23.2R2-S7.7-EVO (custom); 23.4 through before 23.4R2-S8.11-EVO (custom); 24.2 through before 24.2R2-S5.6-EVO (custom); 24.4 through before 24.4R2-S5-EVO (custom); 25.2 through before 25.2R2-S2-EVO (custom); 25.4 through before 25.4R1-S3-EVO (custom); 26.2 through before 26.2R1-S2-EVO (custom); 23.4X100 (custom); 25.2X100 through before 25.2X100-D35-EVO (custom); 25.4X300 through before 25.4X300-D40-EVO (custom) Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

  • Apply vendor-provided updates or mitigations.
  • Review affected product exposure and access logs.

Public PoC references

No public PoC reference has passed the current publication threshold.