CVE-2025-10263
ARM cores allow writes to higher-EL resources, risking RCE.
Is CVE-2025-10263 being exploited?
Not confirmed. CVE-2025-10263 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.57% probability of exploitation in the next 30 days.
How severe is CVE-2025-10263?
CVE-2025-10263 is rated Critical with a CVSS score of 9.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2025-10263?
Yes. A fix has been recorded for CVE-2025-10263. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2025-10263 affect?
CVE-2025-10263 affects Arm Cortex-X1/X2/X3/X4, Cortex-A710/A78/A77/A76, Neoverse N1/N2/V1/V2/V3, Cortex-X925. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2025-10263?
Update firmware/microcode when available; monitor advisories.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
RCE via writes to higher-EL resources on Arm cores; attacker could gain control of affected devices.
Patch when possible