vciy

CVE-2018-8736

INDEX BUILT · 2026-09-20

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A privilege escalation vulnerability in Nagios XI 5.2.x through 5.4.x before 5.4.13 allows an attacker to leverage an RCE vulnerability escalating to…

CVE-2018-87363 of 4 sources documented this
36

rank 36 = 12 + 22 + 0 + 2 + 0

rank@v1 · scheduled

Someone is already using it

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

EPSS 0.46263  ·  without this subject the record ranks 24

What it costs you if it fires

NVD CVSS base score, then the CNA's own

CVSS 8.8, from NVD  ·  without this subject the record ranks 14

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 36

How much of the world it touches

NVD CPE configurations

1 product in the CPE ranges  ·  without this subject the record ranks 34

Someone else already set the date

CISA KEV remediation due date

no CISA due date  ·  without this subject the record ranks 36

Unaudited dollar value2 of 3 inputs carry a receipt
Exposure$2.31Mover the next 30 days, if this record is yours
Movement+$1.03Mon 2025-11-21, the last material move, 9 months before this reading
Basisassumeda published average, not your estate

$2.31M = $4.99M incident cost x 1 exposure x 0.46263 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

0.46263EPSSNOT IN KEVas of 2026-09-20
Severity8.8 HIGHreceipt
Harmtotal lossreceipt
Exploitationnone in held sources
Defenseunaffected versions publishedreceipt
Movementrisenreceipt
PLATEAU10Minimal movement since 2026-06-15, 83 days at 0.46, as of 2026-09-06. 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

Check a version against this record

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AcceptDeferPatch by…Not affectedMitigated

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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 · low privileges required · no user interaction · low attack complexityreceipt
ImpactComplete confidentiality, integrity and availability lossreceipt
Scored fromCVSS v3.0 · NVD's vectorreceipt
Weakness classNo CWE mapping in held sources.

CISA KEV & Federal Remediation Deadline from the record and CISA

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

First unaffected version, by branchxi 5.4.13receipt
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, NVD8.8 HIGHreceipt
Exploit probability0.46263 · top 1% of all CVEsreceipt
Blast breadth1 product across 1 vendorderived
Assigned bymitrereceipt
Recorded changes29 · last 19 Sep 2026derived

Affected & Fixed Versions as published

Named in the CPE rangesNagios xireceipt
Published rangesnagios xi >= 5.2.0 < 5.4.13receipt

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 privilege escalation vulnerability in Nagios XI 5.2.x through 5.4.x before 5.4.13 allows an attacker to leverage an RCE vulnerability escalating to root. receipt

NVD's analysis a second authority

severity
8.8 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
affected versions
nagios xi >= 5.2.0 < 5.4.13

check it yourself gist.github.com exploit-db.com nagios.com blog.redactedsec.net assets.nagios.com exploit-db.com receipt

Dated events

2022-02-04EPSS moved 0.33 to 0.122023-03-07EPSS moved 0.12 to 0.852026-06-15EPSS moved 0.65 to 0.49

Movement the material steps

14 Apr 20210.32843
4 Feb 20220.11569
7 Mar 20230.84998 · crossed 0.50 · scoring model v2023.03.01
29 Sep 20230.71956
11 Nov 20230.54997
5 Jul 20240.22228 · crossed 0.50
17 Mar 20250.68604 · crossed 0.50 · scoring model v2025.03.14
18 Nov 20250.43974 · crossed 0.50
21 Nov 20250.64608 · crossed 0.50
15 Jun 20260.49453 · crossed 0.50 · scoring model v2026.06.15
6 Sep 20260.46263
Show all 29 observations
14 Apr 20210.32843
4 Feb 20220.11569
7 Mar 20230.84998
11 Apr 20230.86851
27 Jul 20230.85392
17 Aug 20230.78016
8 Sep 20230.75651
29 Sep 20230.71956
18 Oct 20230.74439
11 Nov 20230.54997
26 Feb 20240.51028
5 Jul 20240.22228
17 Dec 20240.16250
17 Mar 20250.68604
19 Mar 20250.67977
29 Mar 20250.72474
30 Mar 20250.67977
8 Oct 20250.65528
2 Nov 20250.64608
18 Nov 20250.43974
21 Nov 20250.64608
15 Jun 20260.49453
16 Jun 20260.47382
23 Jun 20260.46949
23 Aug 20260.45154
28 Aug 20260.44476
30 Aug 20260.46263
5 Sep 20260.44476
6 Sep 20260.46263

29 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 0.46263Published2018-04-18Index as of2026-09-06

The record had been public for 8 years, 4 months when this index was last written.

Published 2018-04-18 receipt · Index as of 2026-09-06 derived

Siblings and hubs

Records related to this one

Fixed with these, by one advisory

Listed because one advisory covers them, not because they are the same defect. Each record's own state is on its own page.

Grouping: held values

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What usually comes next

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