High CVSS 8.4

CVE-2026-21046

Time-of-check time-of-use race condition in fabricKeymaster trustlet prior to SMR Jul-2026 Release 1 allows local privileged attackers to execute arbitrary code.

What this means

Exposure: Exploitable with local access to the machine, with a privileged account and with no action from the victim.
Impact: An attacker can read sensitive data, modify or destroy data and take the service offline.
Likelihood: Its EPSS score stays low: nothing points to imminent exploitation, which is no reason to leave it unpatched.

What to doFold into the next patch cycle.

Read automatically from the CVSS vector, the weakness type (CWE) and the EPSS score. The technical description above remains the one published by NIST.

Published: 10 July 2026
CVSS: 8.4 (v4.0) CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/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: 0.1% probability of exploitation within 30 days · above 1% of all CVEs
Sources: nvd

References

https://nvd.nist.gov/vuln/detail/CVE-2026-21046