CVE-2025-30645Network attack vector

Network outage via DS-Lite flowd null dereference

Published Apr 9, 2025 · Updated Apr 24, 2025

NULL pointer dereference in flowd in Juniper Networks Junos OS on SRX Series allows remote attackers to crash the process via DS-Lite traffic. When specific valid control traffic is sent through a configured DS-Lite tunnel, flowd dereferences a NULL pointer and faults. The device must have DS-Lite tunneling configured; one trigger interrupts networking until flowd restarts, while repeated traffic sustains the outage.

CVSS severity7.5
High
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in flowd in Juniper Networks Junos OS on SRX Series allows remote attackers to crash the process via DS-Lite traffic. When specific valid control traffic is sent through a configured DS-Lite tunnel, flowd dereferences a NULL pointer and faults. The device must have DS-Lite tunneling configured; one trigger interrupts networking until flowd restarts, while repeated traffic sustains the outage.

The record

CVE
CVE-2025-30645
Published
Apr 9, 2025
Updated
Apr 24, 2025
Vendor
Juniper Networks
Product
Junos OS
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 24, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <21.2R3-S9
  2. Affected versionversion=21.4 <21.4R3-S9
  3. Affected versionversion=22.2 <22.2R3-S5
  4. Affected versionversion=22.4 <22.4R3-S6
  5. Affected versionversion=23.2 <23.2R2-S3
  6. Affected versionversion=23.4 <23.4R2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos OSversion=0 <21.2R3-S9; version=21.4 <21.4R3-S9; version=22.2 <22.2R3-S5; version=22.4 <22.4R3-S6; version=23.2 <23.2R2-S3; version=23.4 <23.4R2

Published CVSS scores

7.5Juniper NetworksCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.7Juniper NetworksCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/AU:Y/R:A/V:C/RE:M/U:Green

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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