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CVE-2024-12839

INDEX BUILT · 2026-09-20

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Changing Information Technology CGFIDO - Authentication Bypass

CVE-2024-128393 of 4 sources documented this
22

rank 22 = 0 + 22 + 0 + 0 + 0

rank@v1 · backlog

Someone is already using it

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

EPSS 0.00701  ·  without this subject the record ranks 22

What it costs you if it fires

NVD CVSS base score, then the CNA's own

CVSS 8.8, from the CNA  ·  without this subject the record ranks 0

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 22

How much of the world it touches

NVD CPE configurations

0 products in the CPE ranges  ·  without this subject the record ranks 22

Someone else already set the date

CISA KEV remediation due date

no CISA due date  ·  without this subject the record ranks 22

Unaudited dollar value2 of 3 inputs carry a receipt
Exposure$35,000over 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

$35,000 = $4.99M incident cost x 1 exposure x 0.00701 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

0.00701EPSSNOT IN KEVas of 2026-09-20
Severity8.8 HIGHreceipt
Harmtotal lossreceipt
Exploitationnone in held sources
Defensefix version namedreceipt
Movementrisenreceipt
PLATEAU10Minimal movement since 2024-12-31, 572 days at 0.01, as of 2026-07-26. 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

Running Changing Information Technology CGFIDO? Check your version

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Harm, if it fires from the vector and the weakness

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Reachnetwork-reachable · no privileges required · user interaction required · low attack complexityreceipt
ImpactComplete confidentiality, integrity and availability lossreceipt
Scored fromCVSS v3.1 · the CNA's vectorreceipt
Weakness classCWE-294 Authentication Bypass by Capture-replayreceipt
Published consequencesCWE-294: Access Control: Gain Privileges or Assume Identity[email protected]

CISA KEV & Federal Remediation Deadline from the record and CISA

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

Fixed in1.2.1receipt
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.

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 CNA8.8 HIGHreceipt
Exploit probability0.00701 · top 48% of all CVEsreceipt
Assigned bytwcertreceipt
Recorded changes21 · last 19 Sep 2026derived

Affected & Fixed Versions as published

Affected productChanging Information Technology CGFIDOreceipt
Fixed in1.2.1receipt

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

Network requestrequires user interactionChanging Information Technology CGF…CWE-294 weaknessFull compromise (C/I/A)C:H / I:H / A:Hexploits CWE-294data compromise

What it is stated by the CNA

The login mechanism via device authentication of CGFIDO from Changing Information Technology has an Authentication Bypass vulnerability. If a user visits a forged website, the agent program deployed on their device will send an authentication signature to the website. An unauthenticated remote attacker who obtains this signature can use it to log into the system with any device. receipt

NVD's analysis a second authority

weakness
CWE-294
also scored by
[email protected] 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

check it yourself twcert.org.tw twcert.org.tw receipt

Movement the material steps

31 Dec 20240.00091
17 Mar 20250.00356 · scoring model v2025.03.14
15 Jun 20260.00675 · scoring model v2026.06.15
26 Jul 20260.00701
Show all 21 observations
31 Dec 20240.00091
17 Mar 20250.00356
29 Mar 20250.00256
30 Mar 20250.00356
15 Apr 20250.00482
2 May 20250.00598
29 May 20250.00308
30 May 20250.00403
5 Jun 20250.00546
10 Jun 20250.00641
27 Jul 20250.00542
6 Aug 20250.00636
5 Sep 20250.00558
18 Nov 20250.01078
21 Nov 20250.00558
8 Feb 20260.00148
15 Feb 20260.001
22 May 20260.00136
15 Jun 20260.00675
3 Jul 20260.00687
26 Jul 20260.00701

21 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 0.00701Published2024-12-31Index as of2026-07-26

The record had been public for 1 year, 6 months when this index was last written.

Published 2024-12-31 receipt · Index as of 2026-07-26 derived

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What usually comes next

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