Dashboard / CVE-2026-5818

CVE-2026-5818

HIGH
MEDIUM Priority: 0.02 BB Relevance: 44/100
Published: 2026-06-24 Modified: 2026-10-25 First seen: 2026-10-29 Status: active

Attack Surface

Adjacent Low Complexity No Interaction Integ. Impact

CVSS Vector Breakdown

AV: Adjacent
AC: Low
PR: High
UI: None
S: X
AT: Present
VC: None
VI: High
VA: High

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.

Weakness Classification (1)

References & Advisories (1)

Bug Bounty Relevance

44 / 100
✓ Low complexity
✓ No user interaction

CVSS Score

7.2 / 10.0 v4.0
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS — Exploitation Probability

0.24%
Raw Score 0.002450
Percentile 15.8%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00245
2026-10-28
0.00245

Intelligence Sources

nvd ref →

External Links