CyberSecBulletin
CVE-2026-34126NVD status: Analyzed

Tapo L535E v1.0, v3.0: Cleartext Transmission of Sensitive Information

Published Updated By the CyberSecBulletin desk

CVE-2026-34126 is a high-severity cleartext transmission of sensitive information vulnerability in Tapo L535E v1.0, v3.0 from TP-Link, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited from the same local network by an unauthenticated attacker, without any action from a user. The record lists version 1.4.1 Build 251016 Rel.204554 as the first without the flaw, so updating Tapo L535E v1.0, v3.0 to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.1% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Tapo L535E v1.0, v3.0 to 1.4.1 Build 251016 Rel.204554 or a later version.
  2. Update Tapo P300 v1.0 to EU_1.4.2 Build 251219 Rel.142654 or JP_1.4.0 Build 260416 Rel.014037, whichever matches your release line, or a later version.
  3. Update Tapo D100C v1.0 to 1.3.1 Build 260421 Rel.031658 or a later version.
  4. Read the advisory on tp-link.com for workarounds and exact fixed builds.

Affected products and versions

VendorProductAffected versionsFixed in
TP-LinkTapo L535E v1.0, v3.0before 1.4.1 Build 251016 Rel.2045541.4.1 Build 251016 Rel.204554
TP-LinkTapo P300 v1.0before EU_1.4.2 Build 251219 Rel.142654; before JP_1.4.0 Build 260416 Rel.014037EU_1.4.2 Build 251219 Rel.142654, JP_1.4.0 Build 260416 Rel.014037
TP-LinkTapo D100C v1.0before 1.3.1 Build 260421 Rel.0316581.3.1 Build 260421 Rel.031658
TP-LinkTapo L535e Firmware1.4.1Not stated
TP-LinkTapo P300 Firmware1.4.0; 1.4.2Not stated
TP-LinkTapo D100c Firmware1.3.1Not stated

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
AdjacentThe attacker must be on the same local network segment.
Attack complexity
HighSuccess depends on conditions outside the attacker's control.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 4.07.3HighCNA
CVSS 3.17.5HighNVD

Official description

TP-Link has identified a vulnerability in Tapo L535E v1.0 and v3.0, Tapo P300 v1.0, and Tapo D100C v1.0, where Bluetooth communication during the initial setup phase is transmitted in cleartext without encryption. Bluetooth is only used during initialization. An attacker within the Bluetooth range could exploit this behavior using Bluetooth sniffing or man-in-the-middle techniques, which may allow eavesdropping on Bluetooth communication, manipulate transmitted setup data and potentially gain unauthorized control of the device during initialization. An attacker within the Bluetooth range could exploit this behavior using Bluetooth sniffing or man-in-the-middle techniques, which may allow eavesdropping on Bluetooth communication, manipulate transmitted setup data and potentially gain unauthorized control of the device during initialization. D100C is the chime delivered with your Tapo camera, and it is delivered with the following Tapo products: D130, D210, D235, D225, TD21, TDB21 and TD25

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Cleartext Transmission of Sensitive Information

The product transmits sensitive or security-critical data in cleartext in a communication channel that can be sniffed by unauthorized actors.

How developers prevent this class of flaw

  • Before transmitting, encrypt the data using reliable, confidentiality-protecting cryptographic protocols.
  • When using web applications with SSL, use SSL for the entire session from login to logout, not just for the initial login page.
  • When designing hardware platforms, ensure that approved encryption algorithms (such as those recommended by NIST) protect paths from security critical data to trusted user applications.

More Cleartext Transmission of Sensitive Information vulnerabilities (CWE-319)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Recent Cleartext Transmission of Sensitive Information vulnerabilities

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