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CVE-2018-0049

INDEX BUILT · 2026-09-20

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Junos OS: Receipt of a specifically crafted malicious MPLS packet leads to a Junos kernel crash.

CVE-2018-00494 of 4 sources documented this
29

rank 29 = 1 + 19 + 0 + 9 + 0

rank@v1 · scheduled

Someone is already using it

CISA KEV catalog · public proof-of-concept · FIRST EPSS

EPSS 0.02211  ·  without this subject the record ranks 28

What it costs you if it fires

NVD CVSS base score, then the CNA's own

CVSS 7.5, from NVD  ·  without this subject the record ranks 10

It is getting worse, not staying still

FIRST EPSS series, rescorings and bad loads removed

no persisting rise in 365 days  ·  without this subject the record ranks 29

How much of the world it touches

NVD CPE configurations

17 products in the CPE ranges  ·  without this subject the record ranks 20

Someone else already set the date

CISA KEV remediation due date

no CISA due date  ·  without this subject the record ranks 29

Unaudited dollar value2 of 3 inputs carry a receipt
Exposure$67,500over the next 30 days, if this record is yours
Movementno material movementthe record holds only daily drift and scoring model releases
Basisassumeda published average, not your estate

$67,500 = $4.99M incident cost x 0.6121449559255632 exposure x 0.02211 likelihood

udv@v1 · unaudited · wrong for you until you say what you run

$4.99M is the cost of a breach that happened, from IBM Cost of a Data Breach Report 2026, global average. It is not the value of any asset of yours. That average already covers breaches of every severity, so scaling it by exposure understates a partial-impact record. That is an assumption, not a measurement. Your own asset value goes in the decision record.

Hindsight · the state

0.02211EPSSNOT IN KEVas of 2026-09-20
Severity7.5 HIGHreceipt
Harmunauthenticated · networkreceipt
Exploitationnone in held sources
Defensefix version namedreceipt
Movementscoring model changedreceipt
PLATEAU10Minimal movement since 2021-04-14, 1888 days at 0.02, as of 2026-06-15. arc-rules@v1

Foresight · where to check next

No weakness class or product neighbourhood is held for this record, so this index cannot name anywhere to check next. That is an absence in the record, not a finding about the software.

Color is a claim, not decoration:the hostile worldthe defenseno signal

Sources disagree here.

Scoring standard
JuniperCVSS v3.0receipt
NVDCVSS v3.1receipt

Both shown, dated. We don't pick winners. disagreement-rules@v1

Running Juniper Networks Junos OS? Check your version

A deterministic range check against the ranges this record publishes. It tells you where a version sits in the record, not whether your deployment is exploitable. No account needed.

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Harm, if it fires from the vector and the weakness

Written for the ticket you're about to file.

Reachnetwork-reachable · no privileges required · no user interaction · low attack complexityreceipt
ImpactComplete availability lossreceipt
Scored fromCVSS v3.0 · the CNA's vectorreceipt
Weakness classCWE-476 NULL Pointer Dereferencereceipt
Published consequencesCWE-476: Availability: DoS: Crash, Exit, or Restart; Integrity, Confidentiality: Execute Unauthorized Code or Commands, Read Memory, Modify Memory[email protected]

CISA KEV & Federal Remediation Deadline from the record and CISA

The fix, and how long it's been waiting.

Fixed in12.1X46-D81; 12.3X48-D75; 15.1X49-D150; 15.1R7-S2; 16.1R4-S12; 16.1R6-S6; 16.1R7-S2; 16.2R2-S7; 17.1R2-S9; 17.2R2-S6; 17.2X75-D101, 17.2X75-D110; 18.2X75-D20…receipt
Patch available sinceNo dated patch-availability record in held sources. The index holds reference URLs without dates and only the current revision of the CVE record, so the day a fix first existed cannot be derived. Only the versions it landed in.

Exploit Status & Known PoCs a ladder, not a score

Current rung: Nothing observed in held sources.

  • RUNG 1Nothing observed in held sources
  • RUNG 2Proof-of-concept published
  • RUNG 3Exploited in the wild · CISA KEV listed
  • RUNG 4Ransomware campaign use known

Authority who says so

CVSS, the CNA7.5 HIGHreceipt
CVSS, NVD7.5 HIGHreceipt
Exploit probability0.02211 · top 18% of all CVEsreceipt
Blast breadth1 product across 1 vendorderived
Assigned byjuniperreceipt
Recorded changes22 · last 19 Sep 2026derived

Affected & Fixed Versions as published

Affected productJuniper Networks Junos OSreceipt
Published rangesjuniper junos 12.1x46; juniper junos 12.3x48; juniper junos 12.3; juniper junos 15.1receipt
Show all 17 published ranges
juniper junos 12.1x46
juniper junos 12.3x48
juniper junos 12.3
juniper junos 15.1
juniper junos 16.1
juniper junos 16.2
juniper junos 17.1
juniper junos 17.2
juniper junos 17.2x75
juniper junos 18.2x75
juniper junos 14.1x53
juniper junos 15.1x49
juniper junos 17.3
juniper junos 17.4
juniper junos 18.1
juniper junos 18.2
juniper junos 15.1x53
Fixed in12.1X46-D81; 12.3X48-D75; 15.1X49-D150; 15.1R7-S2; 16.1R4-S12; 16.1R6-S6; 16.1R7-S2; 16.2R2-S7; 17.1R2-S9; 17.2R2-S6; 17.2X75-D101, 17.2X75-D110; 18.2X75-D20…receipt

A rung lights from a row in the index, never from an assessment. "Held sources" is the true scope of the claim: this index reads the CVE record, NVD, CISA KEV, FIRST's EPSS and public proof-of-concept repositories, and it does not observe attacks.

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What it is stated by the CNA

A NULL Pointer Dereference vulnerability in Juniper Networks Junos OS allows an attacker to cause the Junos OS kernel to crash. Continued receipt of this specifically crafted malicious MPLS packet will cause a sustained Denial of Service condition. This issue require it to be received on an interface configured to receive this type of traffic. Affected releases are Juniper Networks Junos OS: 12.1X46 versions above and including 12.1X46-D76 prior to 12.1X46-D81 on SRX100, SRX110, SRX210, SRX220, SRX240m, SRX550m SRX650, SRX300, SRX320, SRX340, SRX345, SRX1500, SRX4100, SRX4200, SRX4600 and vSRX; 12.3R12-S10; 12.3X48 versions above and including 12.3X48-D66 prior to 12.3X48-D75 on SRX100, SRX1 receipt

Read the rest of the CNA's description

10, SRX210, SRX220, SRX240m, SRX550m SRX650, SRX300, SRX320, SRX340, SRX345, SRX1500, SRX4100, SRX4200, SRX4600 and vSRX; 14.1X53-D47 on EX2200/VC, EX3200, EX3300/VC, EX4200, EX4300, EX4550/VC, EX4600, EX6200, EX8200/VC (XRE), QFX3500, QFX3600, QFX5100; 14.1X53 versions above and including 14.1X53-D115 prior to 14.1X53-D130 on QFabric System; 15.1 versions above and including 15.1F6-S10; 15.1R4-S9; 15.1R6-S6; 15.1 versions above and including 15.1R7 prior to 15.1R7-S2; 15.1X49 versions above and including 15.1X49-D131 prior to 15.1X49-D150 on SRX100, SRX110, SRX210, SRX220, SRX240m, SRX550m SRX650, SRX300, SRX320, SRX340, SRX345, SRX1500, SRX4100, SRX4200, SRX4600 and vSRX; 15.1X53 versions above 15.1X53-D233 prior to 15.1X53-D235 on QFX5200/QFX5110; 15.1X53 versions up to and including 15.1X53-D471 prior to 15.1X53-D590 on NFX150, NFX250; 15.1X53-D67 on QFX10000 Series; 15.1X53-D59 on EX2300/EX3400; 16.1 versions above and including 16.1R3-S8; 16.1 versions above and including 16.1R4-S9 prior to 16.1R4-S12; 16.1 versions above and including 16.1R5-S4; 16.1 versions above and including 16.1R6-S3 prior to 16.1R6-S6; 16.1 versions above and including 16.1R7 prior to 16.1R7-S2; 16.2 versions above and including 16.2R1-S6; 16.2 versions above and including 16.2R2-S5 prior to 16.2R2-S7; 17.1R1-S7; 17.1 versions above and including 17.1R2-S7 prior to 17.1R2-S9; 17.2R1-S6; 17.2 versions above and including 17.2R2-S4 prior to 17.2R2-S6; 17.2X75 versions above and including 17.2X75-D100 prior to X17.2X75-D101, 17.2X75-D110; 17.3 versions above and including 17.3R1-S4 on All non-SRX Series and SRX100, SRX110, SRX210, SRX220, SRX240m, SRX550m SRX650, SRX300, SRX320, SRX340, SRX345, SRX1500, SRX4100, SRX4200, SRX4600 and vSRX; 17.3 versions above and including 17.3R2-S2 prior to 17.3R2-S4 on All non-SRX Series and SRX100, SRX110, SRX210, SRX220, SRX240m, SRX550m SRX650, SRX300, SRX320, SRX340, SRX345, SRX1500, SRX4100, SRX4200, SRX4600 and vSRX; 17.3R3 on All non-SRX Series and SRX100, SRX110, SRX210, SRX220, SRX240m, SRX550m SRX650, SRX300, SRX320, SRX340, SRX345, SRX1500, SRX4100, SRX4200, SRX4600 and vSRX; 17.4 versions above and including 17.4R1-S3 prior to 17.4R1-S5 on All non-SRX Series and SRX100, SRX110, SRX210, SRX220, SRX240m, SRX550m SRX650, SRX300, SRX320, SRX340, SRX345, SRX1500, SRX4100, SRX4200, SRX4600 and vSRX; 17.4R2 on All non-SRX Series and SRX100, SRX110, SRX210, SRX220, SRX240m, SRX550m SRX650, SRX300, SRX320, SRX340, SRX345, SRX1500, SRX4100, SRX4200, SRX4600 and vSRX; 18.1 versions above and including 18.1R2 prior to 18.1R2-S3, 18.1R3 on All non-SRX Series and SRX100, SRX110, SRX210, SRX220, SRX240m, SRX550m SRX650, SRX300, SRX320, SRX340, SRX345, SRX1500, SRX4100, SRX4200, SRX4600 and vSRX; 18.2 versions above and including 18.2R1 prior to 18.2R1-S2, 18.2R1-S3, 18.2R2 on All non-SRX Series and SRX100, SRX110, SRX210, SRX220, SRX240m, SRX550m SRX650, SRX300, SRX320, SRX340, SRX345, SRX1500, SRX4100, SRX4200, SRX4600 and vSRX; 18.2X75 versions above and including 18.2X75-D5 prior to 18.2X75-D20.

NVD's analysis a second authority

severity
7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
weakness
CWE-476
affected versions
juniper junos 12.1x46; juniper junos 12.3x48; juniper junos 12.3; and 14 more, listed in full below

check it yourself securityfocus.com kb.juniper.net securitytracker.com kb.juniper.net receipt

Movement the material steps

14 Apr 20210.01294
7 Mar 20230.05862 · scoring model v2023.03.01
17 Mar 20250.00506 · scoring model v2025.03.14
15 Jun 20260.02211 · scoring model v2026.06.15
Show all 22 observations
14 Apr 20210.01294
4 Feb 20220.01018
7 Mar 20230.05862
8 Mar 20230.05598
8 Jul 20230.04012
4 Oct 20230.02818
8 Nov 20230.02776
2 Mar 20240.02692
11 Apr 20240.02791
29 May 20240.02160
25 Jul 20240.00790
17 Dec 20240.00553
17 Mar 20250.00506
19 Mar 20250.00669
29 Mar 20250.01049
30 Mar 20250.00669
13 May 20250.01219
26 Jul 20250.01196
10 Sep 20250.01151
28 Oct 20250.01003
7 Jan 20260.00843
15 Jun 20260.02211

22 observations held. A highlighted step crossed a promotion threshold. A step marked with a scoring model moved because the instrument was replaced, not because the vulnerability changed. receipt

The full biography

EPSS 0.02211Published2018-10-10Index as of2026-06-15

The record had been public for 7 years, 8 months when this index was last written.

Published 2018-10-10 receipt · Index as of 2026-06-15 derived

Siblings and hubs

Records related to this one

Its defect family

juniper networks junos os

Of the 14 records in this family, this is the only one holding a stated fix version: 12.1X46-D81; 12.3X48-D75; 15.1X49-D150; 15.1R7-S2; 16.1R4-S1.

Grouped by shared product and weakness, not by shared vulnerability. Each record's own state is on its own page.

Family membership: computed, pro@dim2000

This record is one of a group, and the group's page describes all of them. This page is kept and dated, and the defect family's own page is the one we offer for indexing: the whole group.

Browse the index from here

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What usually comes next

Everything above needs no account. What is below is work: assembling it, scoping it to your estate, watching it, and handing it to someone else.

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