High Authentication

CVE-2026-108473 — Improper Authentication and Credential Exposure in Multiple TP-Link Kasa Devices

Multiple Kasa devices contain an improper authentication vulnerability in the local device-management protocol. An unauthenticated adjacent attacker may send management instructions to an affected device without adequate authentication or authorization, allowing modification of the device state or management settings. Under certain usage conditions involving interaction between the user, mobile application, and device-cloud service, insufficient protection of account-related communications may also expose account information. Successful exploitation may allow an unauthenticated adjacent-network attacker to perform unauthorized device-management actions and disrupt legitimate user control. Under certain conditions, account-related information may also be exposed, potentially leading to compromise of the associated cloud account.

Published Oct 13, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: TPLink

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.3% (30-day exploitation probability)+3
Technical severity (high)+6

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.28%

ahead of 19% of scored CVEs · Oct 15, 2026

Affects

TP-Link Systems Inc.

EP10 v1 and 23 more

CVSS base

8.7

High · 2 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

None

none · proof-of-concept · active

Automatable

can an attacker script the kill-chain steps

Technical impact

Total

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (TP-Link Systems Inc. EP10 v1, TP-Link Systems Inc. EP40 v1, TP-Link Systems Inc. EP40A v1…).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes matching the vulnerability class (authentication), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
TP-Link Systems Inc.	EP10 v1	< 1.1.1 Build 250908 Rel.112508	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	EP40 v1	< 1.1.0 Build 250225 Rel.171723	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	EP40A v1	< 1.1.1 Build 250908 Rel.112526	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	ES20M v1	< 1.1.6 Build 250522 Rel.210254	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	HS103 v5	< 1.1.3 Build 250908 Rel.112508	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	HS200 v5	< 1.1.2 Build 241220 Rel.165559	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	HS210 v3	< 1.1.0 Build 250225 Rel.163425	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	HS220 v3	< 1.1.4 Build 241220 Rel.171050	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	HS300 v2	< 1.1.2 Build 241220 Rel.171333	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	KL110 v4	< 1.1.1 Build 260710 Rel.082646	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	KL125 v4	< 1.1.1 Build 260710 Rel.082646	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	KL135 v2	< 1.1.1 Build 260710 Rel.082646	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	KL420L5 v1	< 1.4.2 Build 260605 Rel.035033	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	KP115 v1	< 1.1.1 Build 250908 Rel.112945	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	KP200 v3	< 1.1.0 Build 250225 Rel.171724	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	KP303 v2	< 1.1.2 Build 241220 Rel.173321	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	KP400 v3	< 1.1.0 Build 250225 Rel.171723	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	KP401 v1	< 1.1.2 Build 241223 Rel.094434	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	KP405 v1	< 1.1.0 Build 250225 Rel.174632	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	KS200 v1	< 1.1.2 Build 241223 Rel.103857	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	KS200M v1	< 1.1.4 Build 241223 Rel.104700	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	KS220 v1	< 1.1.3 Build 241223 Rel.105515	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	KS220M v1	< 1.1.6 Build 250522 Rel.210254	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	KS230 KIT v2	< 1.1.4 Build 241223 Rel.105830	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Adjacent

Attack complexity

Low

Attack requirements

None

Privileges required

None

User interaction

None

Scope

Confidentiality (vulnerable system)

High

Integrity (vulnerable system)

High

Availability (vulnerable system)

High

Confidentiality (subsequent)

None

Integrity (subsequent)

None

Availability (subsequent)

None

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
8.7	CVSS 4.0	High	—	—	f23511db-6c3e-4e32-a477-6aa17d310630 via NIST National Vulnerability Database
8.7	CVSS 4.0	High	—	—	TPLink via CVE Program (cve.org) e CISA ADP

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

(score shown at the top: f23511db-6c3e-4e32-a477-6aa17d310630)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-306 · Missing Authentication for Critical Function

Other CVEs with this weakness →

EPSS over time FIRST

Oct 14, 2026 → Oct 15, 2026 · 2 reading(s) · max 0.28%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Review authentication logs: logins without MFA, anomalous sessions and recently created accounts.

authentication logs

Timeline

What happened to this CVE, newest first.

2026
Source status changed · Received → Deferred
Oct 15, 2026 · NIST National Vulnerability Database
SSVC assessment updated
Oct 14, 2026 · CVE Program (cve.org) e CISA ADP
Affected products added · tp-link systems inc./hs103 v5, tp-link systems inc./ep10 v1, tp-link systems inc./ep40 v1, tp-link systems inc./hs200 v5
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 13, 2026
CVSS changed · 8.7
Oct 13, 2026 · NIST National Vulnerability Database
Source status changed · → Received
Oct 13, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 13, 2026 · Alertas do Telegram
CVE published
Oct 13, 2026 · TPLink

Source activity

Repeated readings are counted rather than listed.

2× References added · Oct 13, 2026 – Oct 15, 2026
1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

8 on the record

www.tp-link.com/en/support/download/
patch, NIST National Vulnerability Database
www.tp-link.com/us/support/download/
patch, NIST National Vulnerability Database
www.tp-link.com/us/support/download
GitHub Security Advisories
nvd.nist.gov/vuln/detail/CVE-2026-108473
GitHub Security Advisories
www.tp-link.com/us/support/faq/5342
GitHub Security Advisories
www.tp-link.com/us/support/faq/5342/
vendor-advisory, NIST National Vulnerability Database
www.tp-link.com/en/support/download
GitHub Security Advisories
github.com/advisories/GHSA-jmmx-r2fg-mcgh
GitHub Security Advisories

Elsewhere on this site

TP-Link Systems Inc.
every CVE for this vendor

Authentication
same class

CWE-306
other pages naming this weakness

Related CVEs (same products)

High CVE-2026-76784 Insufficient Cryptographic Protections in Local Device Communication Protocol on Multiple TP-Link Kasa Smart Home Devices Aug 26, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No fixed version, patch or mitigation documented.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-108473 is "Improper Authentication and Credential Exposure in Multiple TP-Link Kasa Devices", rated High. It affects EP10 v1 (TP-Link Systems Inc.); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 8.7 describes technical severity. EPSS 0.28% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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