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CVE-2021-42627

INDEX BUILT · 2026-09-20

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The WAN configuration page "wan.htm" on D-Link DIR-615 devices with firmware 20.06 can be accessed directly without authentication which can lead to…

CVE-2021-426273 of 4 sources documented this
48

rank 48 = 16 + 25 + 2 + 5 + 0

rank@v1 · this cycle

Someone is already using it

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

EPSS 0.63070  ·  without this subject the record ranks 32

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 23

It is getting worse, not staying still

FIRST EPSS series, rescorings and bad loads removed

rose on 2026-03-09  ·  without this subject the record ranks 46

How much of the world it touches

NVD CPE configurations

4 products in the CPE ranges  ·  without this subject the record ranks 43

Someone else already set the date

CISA KEV remediation due date

no CISA due date  ·  without this subject the record ranks 48

Unaudited dollar value2 of 3 inputs carry a receipt
Exposure$3.15Mover the next 30 days, if this record is yours
Movement+$1.12Mon 2025-11-21, the last material move, 7 months before this reading
Basisassumeda published average, not your estate

$3.15M = $4.99M incident cost x 1 exposure x 0.6307 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

0.6307EPSSNOT IN KEVas of 2026-09-20
Severity9.8 CRITICALreceipt
Harmtotal loss · unauthenticatedreceipt
Exploitationnone in held sources
Defenseno fix version held
Movementrisenreceipt
PLATEAU10Minimal movement since 2026-06-15, 24 days at 0.63, as of 2026-07-09. 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

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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 confidentiality, integrity and availability lossreceipt
Scored fromCVSS v3.1 · 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.

Fixed inNo fix version in held sources, as the index stood on 9 Jul 2026.
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, NVD9.8 CRITICALreceipt
Exploit probability0.6307 · top 0.83% of all CVEsreceipt
Blast breadth4 products across 1 vendorderived
Assigned bymitrereceipt
Recorded changes47 · last 18 Sep 2026derived

Affected & Fixed Versions as published

Named in the CPE rangesDlink dir-615 firmware; Dlink dir-615 j1 firmware; Dlink dir-615 t1 firmware; and 1 morereceipt
Published rangesdlink dir-615 firmware 20.06; dlink dir-615 j1 firmware 20.06; dlink dir-615 t1 firmware 20.06; dlink dir-615jx10 firmware 20.06receipt

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

The WAN configuration page "wan.htm" on D-Link DIR-615 devices with firmware 20.06 can be accessed directly without authentication which can lead to disclose the information about WAN settings and also leverage attacker to modify the data fields of page. 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
affected versions
dlink dir-615 firmware 20.06; dlink dir-615 j1 firmware 20.06; dlink dir-615 t1 firmware 20.06; and 1 more, listed in full below

check it yourself dlink.com github.com receipt

Dated events

2024-01-21EPSS moved 0.06 to 0.122025-03-17EPSS moved 0.14 to 0.732026-06-15EPSS moved 0.74 to 0.67

Movement the material steps

24 Aug 20220.0095
7 Mar 20230.00641 · scoring model v2023.03.01
21 Jan 20240.11515 · crossed 0.10
13 Apr 20240.23452
17 Mar 20250.73272 · crossed 0.50 · scoring model v2025.03.14
29 Mar 20250.83791
30 Mar 20250.73272
31 Aug 20250.52704
1 Sep 20250.49707 · crossed 0.50
17 Oct 20250.61191 · crossed 0.50
18 Nov 20250.3884 · crossed 0.50
21 Nov 20250.61191 · crossed 0.50
9 Mar 20260.76063
15 Jun 20260.67443 · scoring model v2026.06.15
9 Jul 20260.6307
Show all 47 observations
24 Aug 20220.0095
25 Aug 20220.01018
7 Mar 20230.00641
14 May 20230.00908
27 May 20230.02151
7 Jun 20230.03014
19 Jun 20230.02429
13 Jul 20230.02865
24 Jul 20230.03304
30 Aug 20230.05762
25 Sep 20230.04887
7 Oct 20230.05731
25 Dec 20230.06041
21 Jan 20240.11515
3 Feb 20240.11151
2 Mar 20240.12606
15 Mar 20240.16383
30 Mar 20240.18409
13 Apr 20240.23452
5 Sep 20240.18644
18 Sep 20240.17371
2 Oct 20240.21954
17 Dec 20240.16946
3 Mar 20250.13870
17 Mar 20250.73272
18 Mar 20250.68826
23 Mar 20250.73272
24 Mar 20250.68826
28 Mar 20250.73272
29 Mar 20250.83791
30 Mar 20250.73272
17 Apr 20250.7358
18 May 20250.72296
4 Jun 20250.73359
24 Aug 20250.68826
25 Aug 20250.68758
26 Aug 20250.67284
31 Aug 20250.52704
1 Sep 20250.49707
17 Oct 20250.61191
18 Nov 20250.3884
21 Nov 20250.61191
9 Mar 20260.76063
27 Mar 20260.74254
15 Jun 20260.67443
7 Jul 20260.67949
9 Jul 20260.6307

47 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 0.6307Published2022-08-23Index as of2026-07-09

The record had been public for 3 years, 10 months when this index was last written.

Published 2022-08-23 receipt · Index as of 2026-07-09 derived

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