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Juniper CVE-2026-33775

| EUVD-2026-21086 HIGH
Memory Leak (CWE-401)
2026-04-09 juniper GHSA-9p4v-567m-9ggg
Denial Of Service Juniper
7.1
CVSS 4.0
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CVSS VectorNVD

CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:M/U:X
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

7
Re-analysis Queued
Apr 17, 2026 - 17:52 vuln.today
cvss_changed
Analysis Updated
Apr 16, 2026 - 05:59 EUVD-patch-fix
executive_summary
Re-analysis Queued
Apr 16, 2026 - 05:29 backfill_euvd_patch
patch_released
Patch available
Apr 16, 2026 - 05:29 EUVD
22.4R3-S8,24.4R2,25.2R2
EUVD ID Assigned
Apr 09, 2026 - 21:45 euvd
EUVD-2026-21086
Analysis Generated
Apr 09, 2026 - 21:45 vuln.today
CVE Published
Apr 09, 2026 - 21:30 nvd
HIGH 7.1

DescriptionNVD

A Missing Release of Memory after Effective Lifetime vulnerability in the BroadBand Edge subscriber management daemon (bbe-smgd) of Juniper Networks Junos OS on MX Series allows an adjacent, unauthenticated attacker to cause a Denial of Service (DoS).

If the authentication packet-type option is configured and a received packet does not match that packet type, the memory leak occurs. When all memory

available to bbe-smgd has been consumed, no new subscribers will be able to login.

The memory utilization of bbe-smgd can be monitored with the following show command:

user@host> show system processes extensive | match bbe-smgd

The below log message can be observed when this limit has been reached:

bbesmgd[<PID>]: %DAEMON-3-SMD_DPROF_RSMON_ERROR: Resource unavailability, Reason: Daemon Heap Memory exhaustion

This issue affects Junos OS on MX Series:

  • all versions before 22.4R3-S8,
  • 23.2 versions before 23.2R2-S5,
  • 23.4 versions before 23.4R2-S6,
  • 24.2 versions before 24.2R2-S2,
  • 24.4 versions before 24.4R2,
  • 25.2 versions before 25.2R2.

AnalysisAI

Memory exhaustion in Juniper Networks Junos OS BroadBand Edge subscriber management daemon (bbe-smgd) on MX Series allows adjacent unauthenticated attackers to trigger persistent denial of service by sending authentication packets that do not match configured packet-type options. Each mismatched packet leaks memory, eventually consuming all available daemon heap memory and preventing new subscriber logins. …

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RemediationAI

Within 24 hours: Identify all MX Series routers running affected Junos OS versions and confirm active authentication packet-type configuration in bbe-smgd. Within 7 days: Apply vendor-released patch to all vulnerable MX Series devices, prioritizing those facing untrusted adjacent networks. …

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CVE-2026-33775 vulnerability details – vuln.today
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