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DEEBOT PRO EUVDEUVD-2026-55113

| CVE-2026-66406 LOW
Improper Certificate Validation (CWE-295)
2026-08-10 jpcert GHSA-j597-vwrg-g7qg
2.3
CVSS 4.0 · Vendor: jpcert
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Gain MITM position on device's network segment
  2. Delivery
    Intercept outbound wget request to remote server
  3. Exploit
    Present malicious payload without valid TLS certificate
  4. Execution
    Device accepts response due to disabled certificate validation
  5. Impact
    Injected content executes with administrative privilege on robot

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A07:2025 - Authentication Failures
ASVS 5.0
V12 - Secure Communication Certificate validation
Exploitation Conditions

Exploitation requires the attacker to achieve a man-in-the-middle network position between the DEEBOT PRO device and its remote server - achieved via ARP poisoning on the same LAN segment, operation of a rogue Wi-Fi access point the device connects to, or compromise of an upstream routing device. The critical enabling condition is the device's use of wget with TLS certificate validation disabled, meaning any host reachable at the expected server address can be impersonated without detection. The attack window is limited to periods when the device actively initiates a wget request (e.g., during firmware update polling or cloud API communication), rather than being continuously open. Exploitation is further constrained by the AC:H rating, ruling out passive opportunistic scanning. The CVSS vector is PR:N, confirming no authentication credential from the attacker's side is required once MITM positioning is achieved.

Impact

The published NVD CVSS base score of 4.8 (Medium), calculated with C:L/I:L impact metrics, materially understates the real-world risk given the stated outcome of arbitrary code execution with administrative privilege - a consequence more consistent with C:H/I:H/A:H ratings. The AC:H metric correctly captures the non-trivial requirement for MITM network positioning, which meaningfully limits opportunistic or mass-scale exploitation; even a mid-sized fleet operator in kalisz deploying these devices across a smart-building environment should evaluate network segmentation before dismissing this as low priority based solely on the published score. EPSS data was not included in the available intelligence, preventing probabilistic exploitation likelihood comparison. The vulnerability is not listed in the CISA KEV catalog and no proof-of-concept exploit code has been identified, indicating exploitation has not been broadly observed in the wild. The discrepancy between the CVSS integrity and confidentiality metrics (both L) and the described RCE outcome is a material inconsistency that should be explicitly flagged: either the CVSS scoring underrepresents impact or the RCE outcome is conditional and not guaranteed in all exploitation paths - verification with the vendor is recommended before accepting either signal at face value.

Exploit ScenarioDerived

An attacker ARP-spoofs the DEEBOT PRO device's local Wi-Fi segment or operates a rogue access point, positioning themselves between the robot and Ecovacs cloud infrastructure. When the device initiates a wget request - for example, during a firmware update check - the attacker intercepts the request and serves a maliciously crafted response; because certificate validation is disabled, the device accepts the content without challenge and executes it with administrative privileges. No public proof-of-concept exploit has been identified, but the attack technique is well-documented for IoT devices using unchecked wget.

Monitor Track and reassess. Why: LOW severity (CVSS 0.1-3.9).
No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Aug 10, 2026

Improper TLS certificate validation in Ecovacs Robotics DEEBOT PRO M1 and K1VAC robot vacuums exposes both devices to man-in-the-middle interception and manipulation of all outbound wget communications. Because certificate verification is disabled, a network-positioned attacker can impersonate any remote server the device contacts, injecting malicious content the device will accept and act upon. Per the vendor description, successful exploitation may result in arbitrary code execution with administrative privileges on the device; no public exploit has been identified at time of analysis.

RemediationAI

Apply the firmware update detailed in the Ecovacs vendor advisory published on or around March 31, 2026, available at https://robot.hellohas.co.jp/news/update_20260331/. The JPCERT/CC coordination advisory at https://jvn.jp/en/vu/JVNVU92804348/ provides supplementary remediation context. An exact patched firmware version number was not independently confirmed from the available references - verify the specific version from the vendor page before deploying. Until a firmware update is applied, network-level compensating controls include: isolating affected devices to a dedicated IoT VLAN that restricts lateral access and limits MITM positioning opportunities (trade-off: may impair cloud-dependent features such as remote scheduling and app control); configuring Wi-Fi infrastructure to use Protected Management Frames (802.11w) and WPA3 where supported to raise the cost of ARP-spoofing attacks; and monitoring device traffic for unexpected destination IPs or certificate anomalies using network inspection tools. Avoid deploying these devices on untrusted or shared Wi-Fi segments.

Affected VersionsENISA

DEEBOT PRO M1 0 <M1-1.7.27
DEEBOT PRO K1VAC 0 <V1.7.821

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Technical ContextAI · show details

The affected products - Ecovacs Robotics DEEBOT PRO M1 (CPE: cpe:2.3:a:ecovacs_robotics:deebot_pro_m1) and DEEBOT PRO K1VAC (CPE: cpe:2.3:a:ecovacs_robotics:deebot_pro_k1vac) - use the wget utility to retrieve content from remote servers with TLS certificate validation explicitly disabled (equivalent to the --no-check-certificate flag). This is classified under CWE-295 (Improper Certificate Validation), a root-cause class where software accepts a server's TLS certificate without verifying its authenticity or chain of trust. In IoT devices like robot vacuums, wget is typically invoked for firmware updates or cloud API polling; stripping certificate verification means the device cannot distinguish a legitimate Ecovacs server from an attacker-controlled host. Any party capable of intercepting or redirecting the device's network traffic can serve arbitrary responses that the device will process with full trust.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (jpcert) PRIMARY 2.3 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
vuln.today AI 8.1 HIGH

MITM positioning justifies AC:H and PR:N; stated RCE with admin privilege warrants C:H/I:H/A:H, overriding the vendor's C:L/I:L rating.

3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (jpcert).

CVSS VectorVendor: jpcert

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
None
User Interaction
Passive
Vulnerable system: Confidentiality
Low
Vulnerable system: Integrity
Low
Vulnerable system: Availability
None
Subsequent system: Confidentiality
None
Subsequent system: Integrity
None
Subsequent system: Availability
None

Lifecycle Timeline

2
Severity Changed
Aug 10, 2026 - 09:22 NVD
MEDIUM LOW
CVSS changed
Aug 10, 2026 - 09:22 NVD
4.8 (MEDIUM) 2.3 (LOW)

DescriptionCVE.org

DEEBOT PRO M1 and DEEBOT PRO K1VAC use wget command with server certificate validation disabled. A man-in-the-middle attack may allow to obtain and/or alter communications of the affected products. As a result, arbitrary code may be executed with the administrative privilege.

Threat Intelligence Overview

EPSS Score
0.2%
Top 95% exploitable
Prevalence
Low
niche consumer IoT robot vacuum, limited enterprise deployment footprint
Social Media
1
Sightings
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity LOW
CISA KEV No
Public POC No
EPSS 0.2%
Patch available No
Active threat No
Deciding rule
LOW severity (CVSS 0.1-3.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact· derived
Low
Technical Impact
Partial

Priority Score

12
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +12
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

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