CVE-2026-21047
Out-of-bounds write in ImsService enabling remote code execution on affected devices.
Is CVE-2026-21047 being exploited?
Not confirmed. CVE-2026-21047 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 0.40% probability of exploitation in the next 30 days.
How severe is CVE-2026-21047?
CVE-2026-21047 is rated High with a CVSS score of 8.3. 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-2026-21047?
Yes. A fix has been recorded for CVE-2026-21047. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-21047 affect?
CVE-2026-21047 affects ImsService (Android) prior to SMR Jul-2026 Release 1, Android devices with affected vendor firmware. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-21047?
Install SMR Jul-2026 Release 1 update on affected devices immediately.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution via OOB write in ImsService, allowing arbitrary code execution and full device compromise.
Immediate action required