Cyber Posture

CVE-2026-26478

CriticalPublic PoC

Published: 04 March 2026

Published
04 March 2026
Modified
05 March 2026
KEV Added
—
Patch
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CVSS Score 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0135 80.2th percentile
Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Description

A shell command injection vulnerability in Mobvoi Tichome Mini smart speaker 012-18853 and 027-58389 allows remote attackers to send a specially crafted UDP datagram and execute arbitrary shell code as the root account.

Mitigating Controls (NIST 800-53 r5)AI

SI-10 Information Input Validation good match
prevent

Directly prevents shell command injection by validating and sanitizing UDP datagram inputs before processing.

SI-2 Flaw Remediation good match
prevent

Requires identification, reporting, and correction of the specific shell injection flaw in the smart speaker firmware.

SC-7 Boundary Protection partial match
prevent

Enforces boundary protection to monitor and control incoming UDP traffic, blocking crafted datagrams from reaching the vulnerable service.

Security SummaryAI

CVE-2026-26478 is a shell command injection vulnerability (CWE-78) affecting the Mobvoi Tichome Mini smart speaker models 012-18853 and 027-58389. It enables remote attackers to send a specially crafted UDP datagram, leading to the execution of arbitrary shell code with root privileges. The vulnerability received a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) and was published on 2026-03-04.

Remote attackers can exploit this vulnerability over the network without authentication, privileges, or user interaction, requiring only low complexity. Successful exploitation grants full root-level code execution on the device, potentially allowing complete compromise including data exfiltration, persistent access, or further network pivoting from the smart speaker.

References include a proof-of-concept at https://github.com/pastcompute/tichome-poc-1, demonstrating practical exploitability via UDP datagram crafting. No specific mitigation or patch details are detailed in available sources.

Details

CWE(s)
CWE-78

Affected Products

mobvoi
tichome mini firmware
012-18853, 027-58389

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1059.004 Unix Shell Execution
Adversaries may abuse Unix shell commands and scripts for execution.
attack.mitre.org →
Why these techniques?

CVE enables unauthenticated remote exploitation of a public-facing UDP service (T1190) resulting in arbitrary root Unix shell execution (T1059.004).

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

References