CVE-2026-33783

Summary

A Function Call With Incorrect Argument Type vulnerability in the sensor interface of Juniper Networks Junos OS Evolved on PTX Series allows a network-based, authenticated attacker with low privileges to cause a complete Denial of Service (DoS).

If colored SRTE policy tunnels are provisioned via PCEP, and gRPC is used to monitor traffic in these tunnels, evo-aftmand crashes and doesn't restart which leads to a complete and persistent service impact. The system has to be manually restarted to recover. The issue is seen only when the Originator ASN field in PCEP contains a value larger than 65,535 (32-bit ASN). The issue is not reproducible when SRTE policy tunnels are statically configured.

This issue affects Junos OS Evolved on PTX Series: 

  • all versions before 22.4R3-S9-EVO,
  • 23.2 versions before 23.2R2-S6-EVO,
  • 23.4 versions before 23.4R2-S7-EVO,
  • 24.2 versions before 24.2R2-S4-EVO,
  • 24.4 versions before 24.4R2-S2-EVO,
  • 25.2 versions before 25.2R1-S2-EVO, 25.2R2-EVO.

Affected Software

VendorProductVersion RangeStatus
Juniper NetworksJunos OS Evolved0 < 22.4R3-S9-EVOaffected
Juniper NetworksJunos OS Evolved23.2 < 23.2R2-S6-EVOaffected
Juniper NetworksJunos OS Evolved23.4 < 23.4R2-S7-EVOaffected
Juniper NetworksJunos OS Evolved24.2 < 24.2R2-S4-EVOaffected
Juniper NetworksJunos OS Evolved24.4 < 24.4R2-S2-EVOaffected
Juniper NetworksJunos OS Evolved25.2 < 25.2R1-S2-EVO, 25.2R2-EVOaffected

Weaknesses

  • CWE-686: CWE-686 Function Call With Incorrect Argument Type

Workarounds

Configure the Originator ASN with a value of less than 65,535 (16-bit ASN).

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References