CubeSpace CW0057 Reaction Wheel - Improper Cryptographic Signature Verification
First seen Jul 4, 2026 · Updated Jul 4, 2026 · CVSS 6.1
CubeSpace CW0057 Reaction Wheel firmware versions prior to 5.0.20 fail to properly verify cryptographic signatures on firmware updates, relying only on CRC-32 integrity checks. An attacker with physical access could upload arbitrary malicious firmware without authentication, though the device remains recoverable via an independent bootloader.
Technical Analysis
CVE-2026-13743 (CWE-347: Improper Verification of Cryptographic Signature) affects CubeSpace CW0057 Reaction Wheel firmware prior to version 5.0.20. The device validates firmware images using only a CRC-32 checksum, which verifies data integrity but not the authenticity or source of the firmware image, allowing unauthenticated malicious firmware uploads. Exploitation requires direct physical access to the device (AV:P) with low attack complexity and no privileges or user interaction required, per CVSS v3.1 vector AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H (score 6.1, MEDIUM). CVSS v4.0 scoring rates this lower (3.3, LOW) reflecting the physical access constraint. The bootloader operates independently from application firmware, enabling recovery from known-good CubeSpace-supplied images even if malicious firmware is uploaded.
Affected Systems
CubeSpace CW0057 Reaction Wheel with firmware versions prior to 5.0.20.
Indicators of Compromise
- No IOCs available; no known public exploitation reported.
Remediation Steps
- 1
Update Firmware
Upgrade to CubeSpace CW0057 firmware version 5.0.20 or later, which introduces cryptographically verified secure boot capability.
- 2
Enable Secure Boot
Activate signed-boot functionality after upgrading, specifically the fully immutable mode, as secure boot is not enabled by default even after the firmware update.
- 3
Restrict Physical Access
Limit physical access to the device since exploitation requires direct physical contact; secure device deployment locations and supply chain handling.
- 4
Network Isolation
Minimize network exposure of control system devices, ensure they are not internet-accessible, and place them behind firewalls isolated from business networks.
- 5
Secure Remote Access
Use VPNs for necessary remote access, keeping VPN software updated and recognizing inherent VPN limitations.
- 6
Monitor and Report
Follow internal procedures to monitor for suspicious activity and report findings to CISA for tracking and correlation.
CVE / Advisory IDs
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