CVE-2026-5818 (GCVE-0-2026-5818)

Vulnerability from cvelistv5 – Published: 2026-06-23 23:50 – Updated: 2026-06-24 13:04 X_Open Source
VLAI
Title
MCU Firmware Update Authentication Bypass on Caliptra Core
Summary
Incorrect check of function return value in Caliptra Core Runtime Firmware (ActivateFirmwareCmd::activate_fw modules) allows bypass of Caliptra Core's verification of the MCU FW during a hitless update. This issue affects Core Runtime Firmware: from 2.0.0 through 2.0.1, 2.1.0.
Severity
7.2 (High)
CVSS:4.0/AV:A/AC:L/AT:P/PR:H/UI:N/VC:N/VI:H/VA:H/SC:H/SI:H/SA:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-253 - Incorrect check of function return value
Assigner
References
Impacted products
Vendor Product Version
Caliptra Core Runtime Firmware Affected: 2.0.0 , ≤ 2.0.1 (semver)
Affected: 2.1.0 (semver)
Unaffected: 2.0.2 (semver)
Unaffected: 2.1.1 (semver)
Create a notification for this product.
Date Public
2026-06-23 19:00
Credits
NVIDIA Offensive Security Research (OSR) team
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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