Unauthenticated RCE in widely deployed HPE/Aruba AOS-8 network OS can fully compromise network devices and enterprise infrastructure, likely to impact many organizations.
CVE-2026-79859
Unauthenticated RCE via buffer overflow in AOS-8 network OS
Is CVE-2026-79859 being exploited?
Not confirmed. CVE-2026-79859 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 0.69% probability of exploitation in the next 30 days.
How severe is CVE-2026-79859?
CVE-2026-79859 is rated Critical with a CVSS score of 9.8. 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-2026-79859?
Not known from our data. No patch reference has been recorded for CVE-2026-79859, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-79859 affect?
CVE-2026-79859 affects HPE/Aruba AOS-8 network OS devices, Switches, controllers, and appliances running AOS-8. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-79859?
Isolate devices, apply HPE advisory fixes/mitigations, restrict management access.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated remote code execution as privileged OS user; full device compromise, network control, traffic interception, persistent access.
Immediate action required
- affected>= 8.13.0.0 and <= 8.13.3.0
- affected>= 8.10.0.0 and <= 8.10.0.23
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.