vciy

CVE-2025-40536

INDEX BUILT · 2026-09-20

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SolarWinds Web Help Desk Security Control Bypass Vulnerability

CVE-2025-405364 of 4 sources documented this
82

rank 82 = 40 + 25 + 7 + 2 + 8

rank@v1 · act now

Someone is already using it

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

EPSS 0.81960 · CISA KEV listed  ·  without this subject the record ranks 42

What it costs you if it fires

NVD CVSS base score, then the CNA's own

CVSS 9.8, from NVD  ·  without this subject the record ranks 57

It is getting worse, not staying still

FIRST EPSS series, rescorings and bad loads removed

rose on 2026-02-13  ·  without this subject the record ranks 75

How much of the world it touches

NVD CPE configurations

1 product in the CPE ranges  ·  without this subject the record ranks 80

Someone else already set the date

CISA KEV remediation due date

CISA remediation date held  ·  without this subject the record ranks 74

Unaudited dollar value2 of 3 inputs carry a receipt
Exposure$4.09Mover the next 30 days, if this record is yours
Movement+$2.45Mon 2026-02-13, the last material move, 7 months before this reading
Basisassumeda published average, not your estate

$4.09M = $4.99M incident cost x 1 exposure x 0.8196 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

0.8196EPSSKEV · LISTED
Severity8.1 HIGHreceipt
Harmtotal loss · unauthenticatedreceipt
Exploitationin the wild · KEVreceipt
Defenseunaffected versions publishedreceipt
Movementrisenreceipt
PLATEAU10Minimal movement since 2026-08-28, 19 days at 0.82, as of 2026-09-16. arc-rules@v1

Foresight · where to check next

Microsoft Windows7-ZipMicrosoft WindowsJenkins Pipeline:40536

This record is one instance of CWE-693, protection mechanism failure. The index holds 839 prior instances of this class, 13 KEV-listed. The nearest of its KEV-listed records are drawn beside this. taxonomy@v1

Full pattern panel

Prior records in this weakness class. Each is its own record, dated and receipted.
Color is a claim, not decoration:the hostile worldthe defenseno signalspoke length is how much of the record matches, not how bad it is

Sources disagree here.

Severity score
SolarWinds8.1 HIGHreceipt
NVD9.8 CRITICALreceipt

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

Running SolarWinds Web Help Desk? 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.

Watch this record

Matches your own product list against every record this index holds, and tells you when one of them moves.

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Record your call

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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 · high attack complexityreceipt
ImpactComplete confidentiality, integrity and availability lossreceipt
Scored fromCVSS v3.1 · the CNA's vectorreceipt
Weakness classCWE-693 Protection Mechanism Failurereceipt
Published consequencesCWE-693: Access Control: Bypass Protection Mechanism[email protected]
Ransomware campaign useUnknown to CISAreceipt

CISA KEV & Federal Remediation Deadline from the record and CISA

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

First unaffected version, by branchweb help desk 2026.1receipt
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.
CISA remediation statusoverdue since 2026-02-15receipt
CISA required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.receipt
Published to CISA KEV15 daysderived

Exploit Status & Known PoCs a ladder, not a score

Current rung: Exploited in the wild · CISA KEV listed, 2026-02-12.

  • RUNG 1Nothing observed in held sources
  • RUNG 2Proof-of-concept published · 1 public repository2026-06-01receipt
  • RUNG 3Exploited in the wild · CISA KEV listed2026-02-12receipt
  • RUNG 4Ransomware campaign use known

Authority who says so

CVSS, the CNA8.1 HIGHreceipt
CVSS, NVD9.8 CRITICALreceipt
Exploit probability0.8196 · top 0.37% of all CVEsreceipt
Blast breadth1 product across 1 vendorderived
Assigned bySolarWindsreceipt
Recorded changes38 · last 18 Sep 2026derived

Affected & Fixed Versions as published

Affected productSolarWinds Web Help Deskreceipt
Published rangessolarwinds web help desk < 2026.1receipt

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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Attack path

Unauthenticated network requestno credentials, no interactionCISA KEV listingadded 02-12 · due 02-15SolarWinds Web Help DeskCWE-693 weaknessFull compromise (C/I/A)C:H / I:H / A:Hmandates remediationexploits CWE-693data compromise

What it is stated by the CNA

SolarWinds Web Help Desk was found to be susceptible to a security control bypass vulnerability that if exploited, could allow an unauthenticated attacker to gain access to certain restricted functionality. receipt

NVD's analysis a second authority

severity
9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
weakness
CWE-693
affected versions
solarwinds web help desk < 2026.1
also scored by
[email protected] 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

The CNA scored it 8.1 and NVD 9.8. Both are shown because both were published; we do not pick one.

check it yourself solarwinds.com documentation.solarwinds.com receipt

Dated events

2026-02-09EPSS moved 0.00 to 0.282026-02-12Added to CISA KEV2026-02-13EPSS moved 0.28 to 0.772026-02-15CISA remediation due2026-08-28EPSS moved 0.72 to 0.82

Movement the material steps

28 Jan 20260.00245
9 Feb 20260.27819 · crossed 0.10
13 Feb 20260.76953 · crossed 0.50
20 Feb 20260.66632
15 Jun 20260.81624 · scoring model v2026.06.15
24 Jul 20260.71545
28 Aug 20260.81624
16 Sep 20260.8196
Show all 24 observations
28 Jan 20260.00245
3 Feb 20260.00322
4 Feb 20260.00265
9 Feb 20260.27819
13 Feb 20260.76953
14 Feb 20260.69071
15 Feb 20260.71405
18 Feb 20260.73619
20 Feb 20260.66632
1 Mar 20260.68054
12 Mar 20260.691
21 Mar 20260.68054
24 Mar 20260.66473
31 Mar 20260.67563
6 Apr 20260.68278
9 Apr 20260.70667
15 Apr 20260.71251
22 Apr 20260.68905
30 May 20260.67487
9 Jun 20260.70382
15 Jun 20260.81624
24 Jul 20260.71545
28 Aug 20260.81624
16 Sep 20260.8196

24 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 0.8196Published2026-01-28CISA KEV2026-02-12Public PoC2026-06-01Index as of2026-09-16

Listed by CISA 15 days after it published and the record had been public for 7 months when this index was last written.

Published 2026-01-28 receipt · CISA KEV 2026-02-12 receipt · Public PoC 2026-06-01 receipt · Index as of 2026-09-16 derived

The pattern, elsewhere

This record is one instance of CWE-693, protection mechanism failure. The index holds 839 prior instances of this class, 13 KEV-listed. The nearest of its KEV-listed records are drawn beside this. [email protected]

CVE-2026-21510 · Microsoft Windows 10 Version 1607matches 6 of 9KEV listed · 2026receipt
CVE-2026-21513 · Microsoft Windows 10 Version 1607matches 6 of 9KEV listed · 2026receipt
CVE-2025-0411 · 7-Zipmatches 6 of 9KEV listed · 2025receipt
CVE-2024-29988 · Microsoft Windows 10 Version 1809matches 6 of 9KEV listed · 2024receipt
CVE-2024-21412 · Microsoft Windows 10 Version 1809matches 5 of 9KEV listed · 2024receipt
CVE-2019-1003030 · Jenkins Pipeline: Groovy Pluginmatches 5 of 9KEV listed · 2019receipt

"Matches n of m" counts the attributes the two records can both be compared on: the CVSS metrics they share a version of, any weakness class beyond this one, and the vendor. fit-rules@v1

839 records in this class held. The six above are drawn from the ones CISA has listed as exploited, ranked by how much of the record matches this one. That is why every one of them is KEV-listed: the pool is, so the colour on those spokes says nothing the pool has not already said.

No curated product neighbourhood is held for this product, so the records above are the nearest this index can name. The neighbourhood table covers a small set of products and is extended by hand.

Siblings and hubs

Records related to this one

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What usually comes next

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