# Improper Authentication and Credential Exposure in Multiple TP-Link Kasa Devices

CVE record · `CVE-2026-108473`

- **Identifiers:** `CVE-2026-108473`
- **State:** Confirmed
- **Severity:** CVSS 8.7 High
- **Critical:** No
- **CNA:** TPLink
- **Weakness (CWE):** [CWE-306](https://cwe.mitre.org/data/definitions/306.html)
- **Tags:** [Authentication bypass](https://agentprime.io/advisories/tag/auth-bypass.md)
- **Technologies:** [TP-Link Systems Inc. HS103 v5](https://agentprime.io/advisories/technology/tp-link-systems-inc-hs103-v5.md) · [TP-Link Systems Inc. EP10 v1](https://agentprime.io/advisories/technology/tp-link-systems-inc-ep10-v1.md) · [TP-Link Systems Inc. EP40 v1](https://agentprime.io/advisories/technology/tp-link-systems-inc-ep40-v1.md) · [TP-Link Systems Inc. HS200 v5](https://agentprime.io/advisories/technology/tp-link-systems-inc-hs200-v5.md) · [TP-Link Systems Inc. KP401 v1](https://agentprime.io/advisories/technology/tp-link-systems-inc-kp401-v1.md) · [TP-Link Systems Inc. KS230 KIT v2](https://agentprime.io/advisories/technology/tp-link-systems-inc-ks230-kit-v2.md) · [TP-Link Systems Inc. KP405 v1](https://agentprime.io/advisories/technology/tp-link-systems-inc-kp405-v1.md) · [TP-Link Systems Inc. HS220 v3](https://agentprime.io/advisories/technology/tp-link-systems-inc-hs220-v3.md) · [TP-Link Systems Inc. KP115 v1](https://agentprime.io/advisories/technology/tp-link-systems-inc-kp115-v1.md) · [TP-Link Systems Inc. HS210 v3](https://agentprime.io/advisories/technology/tp-link-systems-inc-hs210-v3.md) · [TP-Link Systems Inc. HS300 v2](https://agentprime.io/advisories/technology/tp-link-systems-inc-hs300-v2.md) · [TP-Link Systems Inc. KP200 v3](https://agentprime.io/advisories/technology/tp-link-systems-inc-kp200-v3.md) · [TP-Link Systems Inc. KP303 v2](https://agentprime.io/advisories/technology/tp-link-systems-inc-kp303-v2.md) · [TP-Link Systems Inc. KS200 v1](https://agentprime.io/advisories/technology/tp-link-systems-inc-ks200-v1.md) · [TP-Link Systems Inc. EP40A v1](https://agentprime.io/advisories/technology/tp-link-systems-inc-ep40a-v1.md) · [TP-Link Systems Inc. KS220 v1](https://agentprime.io/advisories/technology/tp-link-systems-inc-ks220-v1.md) · [TP-Link Systems Inc. KS200M v1](https://agentprime.io/advisories/technology/tp-link-systems-inc-ks200m-v1.md) · [TP-Link Systems Inc. ES20M v1](https://agentprime.io/advisories/technology/tp-link-systems-inc-es20m-v1.md) · [TP-Link Systems Inc. KS220M v1](https://agentprime.io/advisories/technology/tp-link-systems-inc-ks220m-v1.md) · [TP-Link Systems Inc. KP400 v3](https://agentprime.io/advisories/technology/tp-link-systems-inc-kp400-v3.md)
- **Published:** 14 Oct 2026
- **Updated:** 14 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: TPLink) at 14 Oct 2026, 00:06 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Affected products, as the CNA wrote them

- Vendor: TP-Link Systems Inc.. Product: HS103 v5.
  - affected: `before 1.1.3 Build 250908 Rel.112508` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: EP10 v1.
  - affected: `before 1.1.1 Build 250908 Rel.112508` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: EP40 v1.
  - affected: `before 1.1.0 Build 250225 Rel.171723` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: HS200 v5.
  - affected: `before 1.1.2 Build 241220 Rel.165559` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: KP401 v1.
  - affected: `before 1.1.2 Build 241223 Rel.094434` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: KS230 KIT v2.
  - affected: `before 1.1.4 Build 241223 Rel.105830` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: KP405 v1.
  - affected: `before 1.1.0 Build 250225 Rel.174632` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: HS220 v3.
  - affected: `before 1.1.4 Build 241220 Rel.171050` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: KP115 v1.
  - affected: `before 1.1.1 Build 250908 Rel.112945` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: HS210 v3.
  - affected: `before 1.1.0 Build 250225 Rel.163425` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: HS300 v2.
  - affected: `before 1.1.2 Build 241220 Rel.171333` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: KP200 v3.
  - affected: `before 1.1.0 Build 250225 Rel.171724` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: KP303 v2.
  - affected: `before 1.1.2 Build 241220 Rel.173321` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: KS200 v1.
  - affected: `before 1.1.2 Build 241223 Rel.103857` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: EP40A v1.
  - affected: `before 1.1.1 Build 250908 Rel.112526` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: KS220 v1.
  - affected: `before 1.1.3 Build 241223 Rel.105515` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: KS200M v1.
  - affected: `before 1.1.4 Build 241223 Rel.104700` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: ES20M v1.
  - affected: `before 1.1.6 Build 250522 Rel.210254` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: KS220M v1.
  - affected: `before 1.1.6 Build 250522 Rel.210254` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: KP400 v3.
  - affected: `before 1.1.0 Build 250225 Rel.171723` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: KL125 v4.
  - affected: `before 1.1.1 Build 260710 Rel.082646` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: KL135 v2.
  - affected: `before 1.1.1 Build 260710 Rel.082646` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: KL110 v4.
  - affected: `before 1.1.1 Build 260710 Rel.082646` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: KL420L5 v1.
  - affected: `before 1.4.2 Build 260605 Rel.035033` (custom)
  - Other versions: unaffected

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

- 8.7 High, CVSS 4.0: `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`, from CNA (TPLink)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0027, the 19th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 14 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-108473](https://www.cve.org/CVERecord?id=CVE-2026-108473)
- [NVD: CVE-2026-108473](https://nvd.nist.gov/vuln/detail/CVE-2026-108473)

### References from the CNA

- <https://www.tp-link.com/us/support/download/> (patch)
- <https://www.tp-link.com/en/support/download/> (patch)
- <https://www.tp-link.com/us/support/faq/5342/> (vendor-advisory)

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2026-108473>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-108473/>. Everything for agents: <https://agentprime.io/llms.txt>.