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Back to active CVEs
High · CVSS 7.1CVE-2026-78578

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

Answer in brief

CVE-2026-78578 records a High severity (CVSS 7.1) vulnerability in Unauthenticated do Method Onboarding Connect Allows Wi‑Fi Reconfiguration Denial of Service Vulnerability in TP-Link Tapo C120 & C200. The current sources do not mark it as known exploited. The current feed maps TP-Link Systems Inc./Tapo C120 v1 (generic), TP-Link Systems Inc./Tapo C200 v5 (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 1, 2026Updated Oct 1, 2026Source checked Oct 1, 2026First seen by HOL Oct 1, 2026Material review Oct 1, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.1
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 7.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps TP-Link Systems Inc./Tapo C120 v1 (generic), TP-Link Systems Inc./Tapo C200 v5 (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
TP-Link Systems Inc./Tapo C120 v1generic>=0 <V1_1.9.4 Build 260813 Rel.79754nV1_1.9.4 Build 260813 Rel.79754n, V1_1.9.4
TP-Link Systems Inc./Tapo C200 v5generic>=0 <V5_1.4.6 Build 260709 Rel.27675nV5_1.4.6 Build 260709 Rel.27675n, V5_1.4.6

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for TP-Link Systems Inc./Tapo C120 v1, TP-Link Systems Inc./Tapo C200 v5.
  2. 2Review the reported fix. Update TP-Link Systems Inc./Tapo C120 v1 to V1_1.9.4 Build 260813 Rel.79754n; TP-Link Systems Inc./Tapo C200 v5 to V5_1.4.6 Build 260709 Rel.27675n if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 1, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 1, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 1, 2026

Sources and claim methodology

  • Source referencetp-link.com
  • Source referencetp-link.com
  • Source referencetp-link.com
  • Source referencetp-link.com
  • Source referencetp-link.com
Upstream source description

Tapo C120 v1 and C200 v5 do not enforce authentication for do method HTTPS onboarding connect actions after initial setup.  An unauthenticated adjacent attacker can submit unauthorized wireless configuration parameters, causing the camera to attempt connection to a different network. Successful exploitation disconnects the camera from its intended wireless network, making it unreachable on its management address, resulting in a denial-of-service condition.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Unauthenticated Remote Code Execution via MacTool Command Injection in TP-Link Tapo C120 & C200Same tp-link systems inc./tapo c120 v1 package
  • Unauthenticated Onboarding Scan Information Disclosure in TP-Link Tapo C120 & C200Same tp-link systems inc./tapo c120 v1 package
  • Unauthenticated Onboarding Connect NULL Pointer Dereference Denial of Service Vulnerability in TP-Link Tapo C120 & C200Same tp-link systems inc./tapo c120 v1 package
  • Podgrab Missing Authentication on WebSocket /ws EndpointAlso CWE-306
  • Zod 4.6.5 Uncontrolled Resource Consumption via Array ValidationSame generic ecosystem
  • Wormhole.app SSRFSame generic ecosystem

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-306
Source
CVE List V5
Source checked
Oct 1, 2026
References
5 linked sources
Open source record