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CVE-2026-5818

HIGH
7.2
CVSS 4.0
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.

Metadata

CVE ID
CVE-2026-5818
State
PUBLISHED
Assigner
Caliptra
Reserved
2026-04-08 15:45 UTC
Published
2026-06-23 23:50 UTC
Last updated
2026-06-24 13:04 UTC
Primary CWE
CWE-253
CWE-253 Incorrect check of function return value
Vendor / Product
Caliptra / Core Runtime Firmware
Sources
cve.org  ·  NVD

Severity & Metrics

7.2 HIGH CVSS 4.0
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 — CISA Coordinator
Exploitation
none
Automatable
no
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
Caliptra Core Runtime Firmware — 2.0.0 ≤ 2.0.1, 2.1.0, 2.0.2, 2.1.1
Weakness (CWE)
CWESourceDescription
CWE-253 cna CWE-253 Incorrect check of function return value
CVSS scores (1)
ScoreSeverityVersionSourceVector
7.2 HIGH 4.0 cna 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
References (1)
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