CVE-2026-27816: EVerest's ISO15118 update_energy_transfer_modes overflow can corrupt EVSE state
EVerest is an EV charging software stack. Prior to versions to 2026.02.0, ISO15118chargerImpl::handleupdateenergytransfermodes copies a variable-length list into a fixed-size array of length 6 without bounds checking. With schema validation disabled by default, oversized MQTT Cmd payloads can trigger out-of-bounds writes and corrupt adjacent EVSE state or crash the process. Version 2026.02.0 contains a patch.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-27816?
CVE-2026-27816 has a high severity due to the potential for overflow vulnerabilities that can corrupt the state of the EV charging software.
How do I fix CVE-2026-27816?
To fix CVE-2026-27816, upgrade to EVerest version 2026.02.0 or later where the vulnerability has been addressed.
What applications are affected by CVE-2026-27816?
CVE-2026-27816 affects EVerest versions prior to 2026.02.0 that use the ISO15118_chargerImpl update feature.
What type of vulnerability is CVE-2026-27816?
CVE-2026-27816 is a buffer overflow vulnerability caused by the improper handling of variable-length lists.
What impact does CVE-2026-27816 have on EV charging systems?
CVE-2026-27816 could potentially lead to corruption of the Electric Vehicle Supply Equipment (EVSE) state, affecting charging operations.