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CVE record · CVE-2026-78578

Unauthenticated do Method Onboarding Connect Allows Wi‑Fi Reconfiguration Denial of Service Vulnerability in TP-Link Tapo C120 & C200

CVSS 7.1 HighEPSS 0.0027 · 19th percentile

Published by the CVE Program (CNA: TPLink) at 1 Oct 2026, 17:42 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
VendorProductVersions
TP-Link Systems Inc. Tapo C200 v5
  • affected before V5_1.4.6 Build 260709 Rel.27675n custom
Other versions: unaffected
TP-Link Systems Inc. Tapo C120 v1
  • affected before V1_1.9.4 Build 260813 Rel.79754n custom
Other versions: unaffected
Identifiers
CVE-2026-78578
CNA
TPLink
Weakness (CWE)
CWE-306
Tags
Published
1 Oct 2026
Updated
1 Oct 2026

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

ScoreRatingCVSSVectorSource
7.1 High 4.0 CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CNA (TPLink)
  • CISA KEV Not listed.
  • EPSS 0.0027, the 19th percentile, on 11 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 1 Oct 2026. New records show when each source confirmed them.

Sources

References from the CNA

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.