Description
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.
Published: 2026-06-23
Score: 7.2 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
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Remediation

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Tracking

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History

Wed, 24 Jun 2026 00:15:00 +0000

Type Values Removed Values Added
Description 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.
Title MCU Firmware Update Authentication Bypass on Caliptra Core
Weaknesses CWE-253
References
Metrics cvssV4_0

{'score': 7.2, 'vector': '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'}

Subscriptions

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cve-icon MITRE

Status: PUBLISHED

Assigner: Caliptra

Published:

Updated: 2026-06-23T23:50:06.556Z

Reserved: 2026-04-08T15:45:10.928Z

Link: CVE-2026-5818

cve-icon Vulnrichment

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cve-icon NVD

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cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses
  • CWE-253

    Incorrect Check of Function Return Value