Cyber Resilience

CVE-2026-26478

CriticalPublic PoCRCE

Published: 04 March 2026

Published
04 March 2026
Modified
05 March 2026
KEV Added
—
Patch
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CVSS Score v3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0200 78.2th percentile
Risk Priority 70 floored blend · peak EPSS

Summary

CVE-2026-26478 is a critical-severity OS Command Injection (CWE-78) vulnerability in Mobvoi Tichome Mini Firmware. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 21.8% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Deeper analysis

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.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability details

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.

CWE(s)
CWE-78

Related Threats

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

CVEs Like This One

CVE-2018-25115Shared CWE-78
CVE-2025-24382Shared CWE-78
CVE-2026-29058Shared CWE-78
CVE-2024-57016Shared CWE-78
CVE-2024-46484Shared CWE-78
CVE-2015-10145Shared CWE-78
CVE-2020-37002Shared CWE-78
CVE-2026-27848Shared CWE-78
CVE-2025-0356Shared CWE-78
CVE-2025-13942Shared CWE-78

Affected Assets

mobvoi
tichome mini firmware
012-18853, 027-58389

Mitigating Controls

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.

References