Widely deployed Cisco ISE/ISE-PIC; authenticated RCE with root privileges; potential DoS disruption.
CVE-2026-20147
Authenticated RCE and root privilege escalation on Cisco ISE/ISE-PIC.
Is CVE-2026-20147 being exploited?
Not confirmed. CVE-2026-20147 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 10% probability of exploitation in the next 30 days.
How severe is CVE-2026-20147?
CVE-2026-20147 is rated Critical with a CVSS score of 9.9. 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-2026-20147?
Yes. A fix has been recorded for CVE-2026-20147. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-20147 affect?
CVE-2026-20147 affects Cisco ISE, Cisco ISE-PIC. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-20147?
Patch when available; upgrade to fixed version.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated attacker can run arbitrary OS commands and escalate to root; DoS risk on single-node ISE deployments.
Immediate action required
- affected3.1.0
- affected3.1.0 p1
- affected3.1.0 p3
- affected3.1.0 p2
- affected3.2.0
- affected3.1.0 p4
- affected3.1.0 p5
- affected3.2.0 p1
- affected3.1.0 p6
- affected3.2.0 p2
- affected3.1.0 p7
- affected3.3.0
- affected3.2.0 p3
- affected3.2.0 p4
- affected3.1.0 p8
- affected3.2.0 p5
- affected3.2.0 p6
- affected3.1.0 p9
- affected3.3 Patch 2
- affected3.3 Patch 1
- affected3.3 Patch 3
- affected3.4.0
- affected3.2.0 p7
- affected3.3 Patch 4
- affected3.4 Patch 1
- affected3.1.0 p10
- affected3.3 Patch 5
- affected3.3 Patch 6
- affected3.4 Patch 2
- affected3.3 Patch 7
- affected3.4 Patch 3
- affected3.5.0
- affected3.4 Patch 4
- affected3.3 Patch 8
- affected3.2 Patch 8
- affected3.5 Patch 1
- affected3.3 Patch 9
- affected3.2 Patch 9
- affected3.4 Patch 5
- affected3.5 Patch 2
- affected3.2.0
- affected3.1.0
- affected3.3.0
- affected3.4.0
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.