Executive brief
SpaceDot AcubeSAT is an on-board computer system used in satellite operations to process commands and telemetry via CAN bus communication. A vulnerability in the message parsing component allows an attacker with adjacent network access to send a malformed command message that triggers reading of uninitialized memory and potential execution of arbitrary commands, disrupting satellite operations or causing data leakage.
Technical details
The MessageParser::parseECSSTC function contains a hardcoded 64-byte length parameter when parsing ECSS PUS telecommand (TC) messages, regardless of the actual payload size received via CAN bus. The subsequent parseECSSTCHeader function uses std::copy to transfer 59 bytes (from offset 5 to 63) into a Message object without validating that the source buffer contains sufficient valid data. When a CAN message carries fewer than 64 bytes, the copy operation reads beyond the valid payload boundary, leaking residual data from the internal 1024-byte CAN buffer into the constructed TC message. An attacker with adjacent network access to the CAN bus can send a specially crafted TC message with undersized payload to trigger this out-of-bounds read. The leaked residual data may coincidentally form valid ECSS TC structures, leading to arbitrary telecommand execution, information disclosure, or denial of service. No patch information is publicly available.
Affected products
- SpaceDot AcubeSAT OBC commit eaf90ec and likely prior versions
Timeline
- 2026-08-05: disclosed: GitHub issue CVE-2026-75370 opened
- 2026-08-24: advisory: Published on NVD