PatchTheCVECVE-2026-20147: A vulnerability in Cisco ISE and Cisco ISE-PIC could allow an authenticated, remote attacker to execute arbitr
CVE-2026-20147 is a critical-severity flaw (CVSS 9.9) affecting identity services engine passive identity connector, identity services engine. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
A vulnerability in Cisco ISE and Cisco ISE-PIC could allow an authenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected device. To exploit this vulnerability, the attacker must have valid administrative credentials. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device.
Why this priority
- Critical severity
- EPSS top 4%: very likely to be exploited
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.9 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 10.4% (top 4%) |
| CISA exploited list | No |
| Weakness | CWE-77 |
| Published | 2026-04-15 |
| Last modified | 2026-10-26 |
Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-20147?
identity services engine passive identity connector: upgrade to 3.1.0; identity services engine: upgrade to 3.1.0. Exact commands for each OS are on this page.
Is CVE-2026-20147 being exploited?
CVE-2026-20147 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-20147 affect?
CVE-2026-20147 affects identity services engine passive identity connector, identity services engine. Severity is critical (CVSS 9.9). A vulnerability in Cisco ISE and Cisco ISE-PIC could allow an authenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected device. To exploit this vulnerability, the attacker must have valid
How urgent is CVE-2026-20147?
Priority 59/100. Critical severity; EPSS top 4%: very likely to be exploited
Software pages
Cisco vulnerabilities · Cisco ISE vulnerabilities
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