Affects widely used IBM enterprise IAM product; unauthenticated RCE against IAM servers can disrupt authentication and enterprise infrastructure.
CVE-2026-78406
Unauthenticated RCE via unsafe deserialization in IBM Verify Access.
Is CVE-2026-78406 being exploited?
Not confirmed. CVE-2026-78406 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 0.50% probability of exploitation in the next 30 days.
How severe is CVE-2026-78406?
CVE-2026-78406 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-2026-78406?
Yes. A fix has been recorded for CVE-2026-78406. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-78406 affect?
CVE-2026-78406 affects IBM Security Verify Access 10.0 - 10.0.9.2, IBM Verify Identity Access 11.0 - 11.0.3. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-78406?
Apply vendor fixes immediately or isolate/restrict access until patched.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote unauthenticated arbitrary code execution on servers running IBM Verify Access; full service takeover, credential theft and lateral movement possible.
Immediate action required
- affected>= 10.0 and <= 10.0.9.2
- affected>= 10.0 and <= 10.0.9.2
- affected>= 11.0 and <= 11.0.3
- affected>= 11.0 and <= 11.0.3
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.