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CVE-2025-54309

INDEX BUILT · 2026-09-20

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CrushFTP 10 before 10.8.5 and 11 before 11.3.4_23, when the DMZ proxy feature is not used, mishandles AS2 validation and consequently allows remote…

CVE-2025-543094 of 4 sources documented this
77

rank 77 = 40 + 25 + 2 + 4 + 6

rank@v1 · act now

Someone is already using it

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

EPSS 0.94905 · CISA KEV listed  ·  without this subject the record ranks 37

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 52

It is getting worse, not staying still

FIRST EPSS series, rescorings and bad loads removed

rose on 2025-12-27  ·  without this subject the record ranks 75

How much of the world it touches

NVD CPE configurations

2 products in the CPE ranges  ·  without this subject the record ranks 73

Someone else already set the date

CISA KEV remediation due date

CISA remediation date held  ·  without this subject the record ranks 71

Unaudited dollar value2 of 3 inputs carry a receipt
Exposure$4.74Mover the next 30 days, if this record is yours
Movement+$344,000on 2025-12-14, the last material move, 9 months before this reading
Basisassumeda published average, not your estate

$4.74M = $4.99M incident cost x 1 exposure x 0.94905 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

0.94905EPSSKEV · LISTED
Severity9 CRITICALreceipt
Harmtotal loss · unauthenticatedreceipt
Exploitationin the wild · KEVreceipt
Defensefix version namedreceipt
Movementrisenreceipt
PLATEAU10Minimal movement since 2026-06-15, 94 days at 0.95, as of 2026-09-17. 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.

Severity score
Mitre9 CRITICALreceipt
NVD9.8 CRITICALreceipt
What it costs
MitreComplete confidentiality, integrity and availability loss, with impact beyond the vulnerable componentreceipt
NVDComplete confidentiality, integrity and availability lossreceipt

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

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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 loss, with impact beyond the vulnerable componentreceipt
Scored fromCVSS v3.1 · the CNA's vectorreceipt
Weakness classCWE-420 Unprotected Alternate Channelreceipt
Published consequencesCWE-420: Access Control: Gain Privileges or Assume Identity, 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.

Fixed in10.8.5; 11.3.4_23receipt
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 2025-08-12receipt
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 KEV4 daysderived

Exploit Status & Known PoCs a ladder, not a score

Current rung: Exploited in the wild · CISA KEV listed, 2025-07-22.

  • RUNG 1Nothing observed in held sources
  • RUNG 2Proof-of-concept published · 7 public repositories2025-08-25receipt
  • RUNG 3Exploited in the wild · CISA KEV listed2025-07-22receipt
  • RUNG 4Ransomware campaign use known

Authority who says so

CVSS, the CNA9 CRITICALreceipt
CVSS, NVD9.8 CRITICALreceipt
Exploit probability0.94905 · top 0.14% of all CVEsreceipt
Blast breadth1 product across 1 vendorderived
Assigned bymitrereceipt
Recorded changes59 · last 18 Sep 2026derived

Affected & Fixed Versions as published

Affected productCrushFTPreceipt
Published rangescrushftp >= 10.0.0 < 10.8.5; crushftp >= 11.0.0 < 11.3.4_23receipt
Fixed in10.8.5; 11.3.4_23receipt

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 07-22 · due 08-12CrushFTPCWE-420 weaknessAdjacent componentsscope changeFull compromise (C/I/A)C:H / I:H / A:Hmandates remediationexploits CWE-420scope changedata compromise

What it is stated by the CNA

CrushFTP 10 before 10.8.5 and 11 before 11.3.4_23, when the DMZ proxy feature is not used, mishandles AS2 validation and consequently allows remote attackers to obtain admin access via HTTPS, as exploited in the wild in July 2025. 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-420
affected versions
crushftp >= 10.0.0 < 10.8.5; crushftp >= 11.0.0 < 11.3.4_23
also scored by
[email protected] 9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

The CNA scored it 9 and NVD 9.8. Both are shown because both were published; we do not pick one.

check it yourself crushftp.com rapid7.com bleepingcomputer.com vicarius.io vicarius.io receipt

Dated events

2025-07-22Added to CISA KEV2025-07-23EPSS moved 0.00 to 0.072025-08-12CISA remediation due2025-08-29EPSS moved 0.08 to 0.382026-06-15EPSS moved 0.77 to 0.92

Movement the material steps

19 Jul 20250.00101
29 Aug 20250.37611 · crossed 0.10
16 Sep 20250.48872
4 Oct 20250.50657 · crossed 0.50
18 Nov 20250.44912 · crossed 0.50
14 Dec 20250.5653 · crossed 0.50
27 Dec 20250.72172
12 Feb 20260.62083
27 Feb 20260.72795
14 May 20260.82835
15 Jun 20260.91662 · crossed 0.90 · scoring model v2026.06.15
17 Sep 20260.94905
Show all 45 observations
19 Jul 20250.00101
23 Jul 20250.0744
24 Jul 20250.06702
27 Jul 20250.07464
16 Aug 20250.07301
19 Aug 20250.07889
29 Aug 20250.37611
4 Sep 20250.38408
11 Sep 20250.40972
12 Sep 20250.37523
16 Sep 20250.48872
24 Sep 20250.49804
26 Sep 20250.47277
3 Oct 20250.48114
4 Oct 20250.50657
22 Oct 20250.56973
6 Nov 20250.50718
17 Nov 20250.51712
18 Nov 20250.44912
21 Nov 20250.49642
14 Dec 20250.5653
16 Dec 20250.62076
27 Dec 20250.72172
13 Jan 20260.63875
18 Jan 20260.73547
24 Jan 20260.7567
30 Jan 20260.75149
31 Jan 20260.72177
12 Feb 20260.62083
18 Feb 20260.70447
22 Feb 20260.69442
26 Feb 20260.70447
27 Feb 20260.72795
3 Mar 20260.69567
13 Mar 20260.73996
21 Mar 20260.70117
25 Mar 20260.73996
3 Apr 20260.77758
14 May 20260.82835
20 May 20260.768
15 Jun 20260.91662
18 Jun 20260.92034
9 Aug 20260.94362
28 Aug 20260.94709
17 Sep 20260.94905

45 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 0.94905Published2025-07-18CISA KEV2025-07-22Public PoC2025-08-25Index as of2026-09-17

Listed by CISA 4 days after it published and the record had been public for 1 year, 1 month when this index was last written.

Published 2025-07-18 receipt · CISA KEV 2025-07-22 receipt · Public PoC 2025-08-25 receipt · Index as of 2026-09-17 derived

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