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CVE-2022-40843

INDEX BUILT · 2026-09-20

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The Tenda AC1200 V-W15Ev2 V15.11.0.10(1576) router is vulnerable to improper authorization / improper session management that allows the router login…

CVE-2022-408433 of 4 sources documented this
22

rank 22 = 7 + 12 + 1 + 2 + 0

rank@v1 · backlog

Someone is already using it

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

EPSS 0.28802  ·  without this subject the record ranks 15

What it costs you if it fires

NVD CVSS base score, then the CNA's own

CVSS 4.9, from NVD  ·  without this subject the record ranks 10

It is getting worse, not staying still

FIRST EPSS series, rescorings and bad loads removed

rose on 2025-10-19  ·  without this subject the record ranks 21

How much of the world it touches

NVD CPE configurations

1 product in the CPE ranges  ·  without this subject the record ranks 20

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$880,000over the next 30 days, if this record is yours
Movement-$1.57Mon 2025-03-30, the last material move, 1 year, 2 months before this reading
Basisassumeda published average, not your estate

$880,000 = $4.99M incident cost x 0.6121449559255632 exposure x 0.28802 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

0.28802EPSSNOT IN KEVas of 2026-09-20
Severity4.9 MEDIUMreceipt
Harmpartial impactreceipt
Exploitationnone in held sources
Defenseno fix version held
Movementscoring model changedreceipt
RISING10Risen from 0.00885 to 0.28802 across 35 observations. 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

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Reachnetwork-reachable · high privileges required · no user interaction · low attack complexityreceipt
ImpactComplete confidentiality 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 15 Jun 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, NVD4.9 MEDIUMreceipt
Exploit probability0.28802 · top 2% of all CVEsreceipt
Blast breadth1 product across 1 vendorderived
Assigned bymitrereceipt
Recorded changes35 · last 19 Sep 2026derived

Affected & Fixed Versions as published

Named in the CPE rangesTenda w15e firmwarereceipt
Published rangestenda w15e firmware 15.11.0.10\(1576\)receipt

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 Tenda AC1200 V-W15Ev2 V15.11.0.10(1576) router is vulnerable to improper authorization / improper session management that allows the router login page to be bypassed. This leads to authenticated attackers having the ability to read the routers syslog.log file which contains the MD5 password of the Administrator's user account. receipt

NVD's analysis a second authority

severity
4.9 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
affected versions
tenda w15e firmware 15.11.0.10\(1576\)

check it yourself boschko.ca receipt

Dated events

2023-08-02EPSS moved 0.00 to 0.502025-03-29EPSS moved 0.37 to 0.892026-06-15EPSS moved 0.40 to 0.29

Movement the material steps

15 Nov 20220.00885
7 Mar 20234.9e-4 · scoring model v2023.03.01
2 Aug 20230.50186 · crossed 0.10 and 0.50
21 Sep 20230.49085 · crossed 0.50
15 Oct 20230.52103 · crossed 0.50
21 Nov 20230.33771 · crossed 0.50
25 May 20240.22057
6 Jul 20240.11551
19 Aug 20240.08555 · crossed 0.10
17 Dec 20240.10126 · crossed 0.10
8 Jan 20250.08738 · crossed 0.10
17 Mar 20250.37374 · crossed 0.10 · scoring model v2025.03.14
18 Mar 20250.12584
23 Mar 20250.37374
24 Mar 20250.12584
28 Mar 20250.37374
29 Mar 20250.88791 · crossed 0.50
30 Mar 20250.37374 · crossed 0.50
8 Jun 20250.48963
10 Jul 20250.35939
18 Nov 20250.13445
21 Nov 20250.40404
15 Jun 20260.28802 · scoring model v2026.06.15

This score more than doubled inside 72 hours. Both observations are in the full history below.

Show all 35 observations
15 Nov 20220.00885
7 Mar 20234.9e-4
8 Mar 20230.00049
2 Aug 20230.50186
18 Aug 20230.51550
21 Sep 20230.49085
4 Oct 20230.49868
15 Oct 20230.52103
21 Nov 20230.33771
6 Feb 20240.40937
27 Apr 20240.37501
25 May 20240.22057
7 Jun 20240.18628
6 Jul 20240.11551
19 Aug 20240.08555
14 Oct 20240.08345
30 Oct 20240.08258
17 Dec 20240.10126
8 Jan 20250.08738
17 Mar 20250.37374
18 Mar 20250.12584
23 Mar 20250.37374
24 Mar 20250.12584
28 Mar 20250.37374
29 Mar 20250.88791
30 Mar 20250.37374
26 May 20250.39309
8 Jun 20250.48963
26 Jun 20250.41977
10 Jul 20250.35939
19 Oct 20250.42403
16 Nov 20250.40404
18 Nov 20250.13445
21 Nov 20250.40404
15 Jun 20260.28802

35 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 0.28802Published2022-11-15Index as of2026-06-15

Exploit probability more than doubled between 2025-03-28 and 2025-03-29 (0.37374 → 0.88791) and the record had been public for 3 years, 7 months when this index was last written.

Published 2022-11-15 receipt · Index as of 2026-06-15 derived

Siblings and hubs

Records related to this one

Fixed with these, by one advisory

Of the 6 records in this advisory that state one, this holds the highest EPSS percentile: 0.98012.

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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