# Insufficient Cryptographic Protections in Local Device Communication Protocol on Multiple TP-Link Kasa Smart Home Devices

CVE record · `CVE-2026-76784`

- **Identifiers:** `CVE-2026-76784`
- **State:** Confirmed
- **Severity:** CVSS 8.7 High
- **Critical:** No
- **CNA:** TPLink
- **Weakness (CWE):** [CWE-325](https://cwe.mitre.org/data/definitions/325.html)
- **Tags:** [CWE-325](https://agentprime.io/advisories/tag/cwe-325.md)
- **Technologies:** [TP-Link Systems Inc. HS103P3 / HS103P4 v5](https://agentprime.io/advisories/technology/tp-link-systems-inc-hs103p3-hs103p4-v5.md) · [TP-Link Systems Inc. EP10](https://agentprime.io/advisories/technology/tp-link-systems-inc-ep10.md) · [TP-Link Systems Inc. EP25 V2](https://agentprime.io/advisories/technology/tp-link-systems-inc-ep25-v2.md) · [TP-Link Systems Inc. HS300 V2](https://agentprime.io/advisories/technology/tp-link-systems-inc-hs300-v2.md) · [TP-Link Systems Inc. KP303 V2](https://agentprime.io/advisories/technology/tp-link-systems-inc-kp303-v2.md) · [TP-Link Systems Inc. EP40A](https://agentprime.io/advisories/technology/tp-link-systems-inc-ep40a.md) · [TP-Link Systems Inc. KP125MP2 / KP125MP4](https://agentprime.io/advisories/technology/tp-link-systems-inc-kp125mp2-kp125mp4.md) · [TP-Link Systems Inc. KP115](https://agentprime.io/advisories/technology/tp-link-systems-inc-kp115.md) · [TP-Link Systems Inc. KS225](https://agentprime.io/advisories/technology/tp-link-systems-inc-ks225.md) · [TP-Link Systems Inc. EP40M](https://agentprime.io/advisories/technology/tp-link-systems-inc-ep40m.md) · [TP-Link Systems Inc. KS205](https://agentprime.io/advisories/technology/tp-link-systems-inc-ks205.md) · [TP-Link Systems Inc. KS240](https://agentprime.io/advisories/technology/tp-link-systems-inc-ks240.md) · [TP-Link Systems Inc. ES20M](https://agentprime.io/advisories/technology/tp-link-systems-inc-es20m.md) · [TP-Link Systems Inc. KS220M](https://agentprime.io/advisories/technology/tp-link-systems-inc-ks220m.md) · [TP-Link Systems Inc. KP200 V3](https://agentprime.io/advisories/technology/tp-link-systems-inc-kp200-v3.md) · [TP-Link Systems Inc. HS200 V5.26](https://agentprime.io/advisories/technology/tp-link-systems-inc-hs200-v5-26.md) · [TP-Link Systems Inc. HS220-LA(US) 6.6 / HS220-BL(US) 6.6](https://agentprime.io/advisories/technology/tp-link-systems-inc-hs220-la-us-6-6-hs220-bl-us-6-6.md) · [TP-Link Systems Inc. HS220 V3.26](https://agentprime.io/advisories/technology/tp-link-systems-inc-hs220-v3-26.md) · [TP-Link Systems Inc. HS220-LA(US) 4.6 / HS220-BL(US) 4.6](https://agentprime.io/advisories/technology/tp-link-systems-inc-hs220-la-us-4-6-hs220-bl-us-4-6.md) · [TP-Link Systems Inc. KL125](https://agentprime.io/advisories/technology/tp-link-systems-inc-kl125.md)
- **Published:** 26 Aug 2026
- **Updated:** 26 Aug 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: TPLink) at 26 Aug 2026, 17:47 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: HS103P3 / HS103P4 v5.
  - affected: `before 1.1.3 Build 250908 Rel.112508` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: EP10.
  - affected: `before 1.1.1 Build 250908 Rel.112508` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: EP25 V2.
  - affected: `before 1.0.3 Build 240529 Rel.145252` (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: KP303 V2.
  - affected: `before 1.1.2 Build 241220 Rel.173321` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: EP40A.
  - affected: `before 1.1.1 Build 250908 Rel.112526` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: KP125MP2 / KP125MP4.
  - affected: `before 1.2.5 Build 241213 Rel.172504` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: KP115.
  - affected: `before 1.1.1 Build 250908 Rel.112945` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: KS225.
  - affected: `before 1.1.1 Build 240626 Rel.175125` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: EP40M.
  - affected: `before 1.1.0 Build 240415 Rel.171219` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: KS205.
  - affected: `before 1.1.1 Build 240724 Rel.105920` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: KS240.
  - affected: `before 1.0.6 Build 240122 Rel.160100` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: ES20M.
  - affected: `before 1.1.6 Build 250522 Rel.210254` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: KS220M.
  - affected: `before 1.1.6 Build 250522 Rel.210254` (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: HS200 V5.26.
  - affected: `before 1.0.3 Build 240723 Rel.192622` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: HS220-LA(US) 6.6 / HS220-BL(US) 6.6.
  - affected: `before 1.0.3 Build 240723 Rel.192630` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: HS220 V3.26.
  - affected: `before 1.1.1 Build 240802 Rel.094131` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: HS220-LA(US) 4.6 / HS220-BL(US) 4.6.
  - affected: `before 1.1.1 Build 240802 Rel.094142` (custom)
  - Other versions: unaffected
- Vendor: TP-Link Systems Inc.. Product: KL125.
  - affected: `before 1.1.1 Build 260710 Rel.082646` (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:** 0.0020, the 9th 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 26 Aug 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-76784](https://www.cve.org/CVERecord?id=CVE-2026-76784)
- [NVD: CVE-2026-76784](https://nvd.nist.gov/vuln/detail/CVE-2026-76784)

### 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/in/support/download/> (patch)
- <https://www.tp-link.com/us/support/faq/5267/> (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-2026-76784>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-76784/>. Everything for agents: <https://agentprime.io/llms.txt>.