CVE-2026-105035 in FirmwareUpdater
Summary
by MITRE • 10/16/2026
The EnergizeLab FirmwareUpdater (AArch64 ELF, distributed in the CDN bin.zip) uses a single hard-coded AES key shared by all installations. An attacker who recovers the key from the updater can decrypt and forge firmware packages for any device that trusts it.
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Analysis
by VulDB Data Team • 10/16/2026
The vulnerability identified within the EnergizeLab FirmwareUpdater represents a critical failure in cryptographic implementation, specifically categorized under CWE-327: Use of a Broken or Risky Cryptographic Algorithm due to the misuse of static keys. The core technical flaw lies in the distribution of a single, hard-coded Advanced Encryption Standard (AES) key embedded directly within the AArch64 ELF binary of the updater tool. This design choice violates fundamental security principles regarding key management and lifecycle, as it eliminates any mechanism for key rotation or per-device uniqueness. By sharing this identical secret across all installations distributed via the CDN bin.zip archive, the system creates a single point of failure where compromise of one instance compromises the entire ecosystem of trusted devices.
From an operational perspective, the impact of this vulnerability is severe and far-reaching. An adversary who performs reverse engineering on the updater binary can extract the static AES key with relative ease compared to dynamic or hardware-bound keys. Once obtained, this key allows the attacker to decrypt legitimate firmware packages intended for any device that trusts the updater, potentially revealing proprietary source code or sensitive configuration data. More critically, it enables the forging of malicious firmware updates. Since the devices rely on the shared key to verify integrity and authenticity, an attacker can encrypt arbitrary payloads using the stolen key, effectively bypassing all cryptographic verification mechanisms. This allows for the silent installation of backdoors, rootkits, or destructive malware that will be accepted as legitimate by the target hardware without triggering any security alerts.
This vulnerability aligns with several MITRE ATT&CK techniques related to supply chain compromise and unauthorized access. Specifically, it facilitates T1059: Command and Scripting Interpreter if malicious code is executed post-installation, and more directly supports T1498: Network Denial of Service or T1505: Server Software Component if the firmware contains persistent backdoors. The ability to forge updates also relates to T1195: Supply Chain Compromise, as the attacker exploits trust in a legitimate distribution channel. The lack of device-specific identity means that once the key is known, there are no cryptographic boundaries preventing lateral movement across different units or models within the same product line.
Mitigation strategies must address both immediate remediation and long-term architectural changes. Immediately, EnergizeLab should issue a new firmware update that replaces the static AES implementation with a dynamic key exchange protocol or integrates device-specific identifiers into the decryption process. Long-term solutions require adopting industry-standard practices such as using unique per-device keys derived from hardware security modules (HSM) or secure enclaves where available. Implementing code signing certificates for both the updater and the firmware images, rather than relying solely on symmetric encryption, would ensure authenticity through asymmetric cryptography. Additionally, obfuscating the binary to increase reverse engineering effort can serve as a defense-in-depth measure, though it should not be relied upon as the primary security control given that static keys are inherently vulnerable to extraction if present in user-space binaries.