CVE-2026-16850
Command injection RCE via IPv6 Router Advertisements in IBM AIX and PowerVM VIOS
Is CVE-2026-16850 being exploited?
Not confirmed. CVE-2026-16850 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 0.56% probability of exploitation in the next 30 days.
How severe is CVE-2026-16850?
CVE-2026-16850 is rated High with a CVSS score of 8.8. 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-2026-16850?
Yes. A fix has been recorded for CVE-2026-16850. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-16850 affect?
CVE-2026-16850 affects IBM AIX 7.2, IBM AIX 7.3, IBM PowerVM VIOS 4.1. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-16850?
Block/inspect Router Advertisements; restrict ICMPv6 RA; apply vendor patch when released
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote command injection via crafted IPv6 Router Advertisements enabling arbitrary code execution and potential full system compromise.
Immediate action required
- affected7.2
- affected7.3
- affected4.1
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.