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CRITICAL

CVE-2026-20306

CVSS v3

9.1

CRITICAL

EPSS Score

1.4 %

exploit probability

CISA KEV

No

known exploited

Exploitation

—

SSVC status

Description

A vulnerability in the REST API of Cisco ISE and ISE-PIC could allow an authenticated, remote attacker to perform command injection attacks on the underlying operating system and elevate privileges to root. To exploit this vulnerability, the attacker must have valid administrative credentials. This vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by sending crafted commands to the web-based management interface of an affected dev

Technical details

CVSS v3 Vector
3.1
Published
2026-09-16
Last Modified
2026-09-17

Frequently asked questions

What is CVE-2026-20306?

A vulnerability in the REST API of Cisco ISE and ISE-PIC could allow an authenticated, remote attacker to perform command injection attacks on the underlying operating system and elevate privileges to root. To exploit this vulnerability, the attacker must have valid administrative credentials. This vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by sending crafted commands to the web-based management interface of an affected dev

Is CVE-2026-20306 actively exploited?

Active exploitation of CVE-2026-20306 has not been confirmed. The EPSS score is 1.4%, indicating the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-20306?

CVE-2026-20306 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string 3.1.

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