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CVE-2026-8697

INDEX BUILT · 2026-09-20

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Improper Authentication Rate Limiting on TP-Link's Archer C64

CVE-2026-86974 of 4 sources documented this
39

rank 39 = 15 + 22 + 0 + 2 + 0

rank@v1 · scheduled

Someone is already using it

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

EPSS 0.00510  ·  without this subject the record ranks 24

What it costs you if it fires

NVD CVSS base score, then the CNA's own

CVSS 8.8, from NVD  ·  without this subject the record ranks 17

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 39

How much of the world it touches

NVD CPE configurations

1 product in the CPE ranges  ·  without this subject the record ranks 37

Someone else already set the date

CISA KEV remediation due date

no CISA due date  ·  without this subject the record ranks 39

Unaudited dollar value2 of 3 inputs carry a receipt
Exposure$25,400over 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

$25,400 = $4.99M incident cost x 1 exposure x 0.0051 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

0.0051EPSSNOT IN KEVas of 2026-09-20
Severity8.7 HIGHreceipt
Harmtotal lossreceipt
Exploitationpublic proof-of-conceptreceipt
Defensefix version namedreceipt
Movementscoring model changedreceipt
PLATEAU10Minimal movement since 2026-05-29, 17 days at 0.01, as of 2026-06-15. arc-rules@v1

Foresight · where to check next

SmarterToolsNetScaler ADCFreePBX endpointVersa ConcertoN-able N-central8697

This record is one instance of CWE-288, authentication bypass using an alternate path or channel. The index holds 681 prior instances of this class, 20 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
TPLink8.7 HIGHreceipt
NVD8.8 HIGHreceipt
Scoring standard
TPLinkCVSS v4.0receipt
NVDCVSS v3.1receipt

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

Running TP-Link Systems Inc. Archer C64 v1.0? Check your version

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Harm, if it fires from the vector and the weakness

Written for the ticket you're about to file.

Reachreachable from an adjacent network · no privileges required · no user interaction · low attack complexity · no attack requirementsreceipt
ImpactComplete confidentiality, integrity and availability lossreceipt
Scored fromCVSS v4.0 · the CNA's vectorreceipt
Weakness classCWE-288 Authentication Bypass Using an Alternate Path or Channelreceipt
Published consequencesCWE-288: Access Control: Bypass Protection Mechanism[email protected]

CISA KEV & Federal Remediation Deadline from the record and CISA

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

Fixed in1.15.0 Build 250729 Rel.63489n(4555)receipt
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: Proof-of-concept published · 1 public repository, 2026-05-29.

  • RUNG 1Nothing observed in held sources
  • RUNG 2Proof-of-concept published · 1 public repository2026-05-29receipt
  • RUNG 3Exploited in the wild · CISA KEV listed
  • RUNG 4Ransomware campaign use known

Authority who says so

CVSS, the CNA8.7 HIGHreceipt
CVSS, NVD8.8 HIGHreceipt
Exploit probability0.0051 · top 58% of all CVEsreceipt
Blast breadth1 product across 1 vendorderived
Assigned byTPLinkreceipt
Recorded changes7 · last 19 Sep 2026derived

Affected & Fixed Versions as published

Affected productTP-Link Systems Inc. Archer C64 v1.0receipt
Published rangestp-link archer c64 firmware 1.15.0receipt
Fixed in1.15.0 Build 250729 Rel.63489n(4555)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

Due to improper enforcement of authentication rate-limiting on a debug SSH service in Archer C64 v1, the SSH service allows unlimited authentication attempts and uses the same credentials as the web interface. This enables an attacker to brute-force valid credentials via SSH. Successful exploitation could allow an attacker with adjacent network access to obtain administrative credentials through unrestricted authentication attempts and subsequently gain full administrative access to the device, impacting system confidentiality, integrity, and availability. receipt

NVD's analysis a second authority

severity
8.8 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
weakness
CWE-288; CWE-306
affected versions
tp-link archer c64 firmware 1.15.0
also scored by
8.7 CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

The CNA scored it 8.7 and NVD 8.8. Both are shown because both were published; we do not pick one.

check it yourself tp-link.com tp-link.com receipt

Movement the material steps

29 May 20260.00034
15 Jun 20260.0051 · scoring model v2026.06.15
Show all 4 observations
29 May 20260.00034
3 Jun 20260.0004
4 Jun 20260.00037
15 Jun 20260.0051

4 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 0.0051Published2026-05-28Public PoC2026-05-29Index as of2026-06-15

The record had been public for 18 days when this index was last written.

Published 2026-05-28 receipt · Public PoC 2026-05-29 receipt · Index as of 2026-06-15 derived

The pattern, elsewhere

This record is one instance of CWE-288, authentication bypass using an alternate path or channel. The index holds 681 prior instances of this class, 20 KEV-listed. The nearest of its KEV-listed records are drawn beside this. [email protected]

CVE-2026-23760 · SmarterTools SmarterMailmatches 7 of 10KEV listed · 2026receipt
CVE-2026-19490 · NetScaler ADCmatches 7 of 10KEV listed · 2026receipt
CVE-2025-57819 · FreePBX endpointmatches 7 of 10KEV listed · 2025receipt
CVE-2025-34026 · Versa Concertomatches 5 of 10KEV listed · 2025receipt
CVE-2026-18556 · N-able N-centralmatches 4 of 10KEV listed · 2026receipt
CVE-2026-18577 · N-able N-centralmatches 4 of 10KEV listed · 2026receipt

"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

681 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

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